chpasswd: rename long options definition to match other applets. no code changes

getopt32 must remain NOFORK-safe (no mallocs!). Using alloca and pretending
stack is infinite. Unfortunately, +79 bytes.

rework long option handling. saves ~1.2k

function                                             old     new   delta
tar_longopts                                           -     222    +222
static.udhcpc_longopts                                 -     192    +192
start_stop_daemon_longopts                             -     150    +150
getopt32                                            1045    1185    +140
static.wget_longopts                                   -     111    +111
static.od_longopts                                     -     105    +105
getopt_longopts                                        -      96     +96
install_longopts                                       -      67     +67
ipcalc_longopts                                        -      63     +63
static.hwclock_longopts                                -      54     +54
ftpgetput_longopts                                     -      52     +52
static.dumpleases_longopts                             -      32     +32
env_longopts                                           -      31     +31
runparts_longopts                                      -      30     +30
mv_longopts                                            -      24     +24
mkdir_longopts                                         -      19     +19
find_pair                                            164     180     +16
bb_null_long_options                                   -      16     +16
setconsole_longopts                                    -      10     +10
display_speed                                         91      98      +7
collect_blk                                          467     474      +7
show_color                                             4       1      -3
ls_main                                              913     904      -9
bb_default_long_options                               16       -     -16
ls_color_opt                                          32      10     -22
setconsole_long_options                               32       -     -32
arith                                               2077    2030     -47
mv_long_options                                       48       -     -48
mkdir_long_options                                    48       -     -48
env_long_options                                      48       -     -48
static.options                                       248     184     -64
runparts_long_options                                 80       -     -80
ftpgetput_long_options                                96       -     -96
static.hwclock_long_options                          112       -    -112
install_long_options                                 112       -    -112
static.long_options                                  144       -    -144
static.wget_long_options                             160       -    -160
longopts                                             160       -    -160
static.arg_options                                   304       -    -304
tar_long_options                                     320       -    -320
long_options                                         384       -    -384
------------------------------------------------------------------------------
(add/remove: 17/15 grow/shrink: 4/5 up/down: 1444/-2209)     Total: -765 bytes
   text    data     bss     dec     hex filename
 782618    1328   11900  795846   c24c6 busybox_old
 781354    1328   11900  794582   c1fd6 busybox_unstripped

setiles: cosmetics, no real code changes

setfiles,restorecon: new SELinux applets by Yuichi Nakamura <ynakam@hitachisoft.jp>

chpasswd: fix indentation

style fix (stray space before ';')

fix typo in last commit

Three patches from FreeWRT people

chpasswd: fixes for shadow password handling

libbb: nuke BB_GETOPT_ERROR, always die if there are mutually exclusive options
find_pair                                            164     180     +16
passwd_main                                         1222    1230      +8
display_speed                                         91      96      +5
msh_main                                            1335    1339      +4
qrealloc                                              38      36      -2
refresh                                             1190    1182      -8
cut_main                                             543     532     -11
sendCgi                                             1807    1794     -13
getopt32                                            1063    1045     -18
arith                                               2077    2030     -47
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/6 up/down: 33/-99)            Total: -66 bytes
   text    data     bss     dec     hex filename
 781548    1168   11900  794616   c1ff8 busybox_old
 781452    1168   11900  794520   c1f98 busybox_unstripped

chpasswd: fixes and code shrink
update_passwd                                        732     734      +2
chpasswd_main                                        318     292     -26
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 2/-26)             Total: -24 bytes
   text    data     bss     dec     hex filename
 781564    1168   11900  794632   c2008 busybox_old
 781548    1168   11900  794616   c1ff8 busybox_unstripped

chpasswd: now with svn add

chpasswd: new applet by Alexander Shishkin <virtuoso@slind.org>

stray trailing tabs removed

ifup/ifdown: make location of ifstate configurable

vi: comment out dead code

Trim help text. With compressed help: -143 bytes
   text    data     bss     dec     hex filename
 772572    1168   22680  796420   c2704 busybox_old
 772444    1168   22680  796292   c2684 busybox_unstripped

ash: fix SEGV in forkchild (jp can be NULL). here documents were affected.

fix unpacker testsuite to match actual output

awk: actually do "svn add" for testsuite

awk: fix -F 'regex' bug (miscounted fields if last field is empty)

awk: style fixes; remove one xstrdup/free pair; testsuite

vi: style fixlet

fix typo in prev commit :(

vi: s/argv[0]/applet_name/

vi: multiple fixes by Natanael Copa <natanael.copa@gmail.com>
* the puzzling message on error is replaced with strerror(errno)
  so it should be even more detailed and smaller at the same time.
* merged code in edit_file() and code for ':edit <file>' in colon() into
  new func init_text_buffer(). Was horribly duplicate. Moved most of
  error/sanity checking to file_insert(). Result is that you get a proper
  validation (prevent reading /dev/*) and error messages for ':r <file>'
* renamed 'cfn' to 'current_filename' for improved readability
* merged smallint vi_readonly and readonly into bitfields into
  readonly_mode to save space.
* added text_size variable to keep track how big the text buffer is.
  This is used to fix a buffer overflow. To reproduce bug:
  ./busybox vi TODO
  :r Makefile
  vi segfaults due to no buffer checking is done at all. som redesign is
  needed here but i added a check in text_hole_make() to aviod the
  segfault at least.
* removed isblnk() and use isblank(3) instead.
* fixed compiler warning by displaying the return code for :!<command>
  This makes things bigger than needed but since the patch reduces the
  overall size... (see below)
* new func next_tabstop(int) merges some duplicate code. There are more
  cuplicode here but i couldnt find a good way to merge them.
* Fix *ANNOYING* placement of cursor on '\t' characters. To reproduce:
    echo -e "\thello" > file1
    ./busybox vi file1
  Try to insert some text at the beginning of line. Text will be inserted
  but cursor is blinking somewhere else. The patch should make busybox vi
  behave more like original vi(m). Costs a few bytes but its worth it
  imho.
* new_text() is moved into init_text_buffer()
* the previously added update_ro_status() was moved info file_insert due
  to duplication removal mentioned above.
function                                             old     new   delta
init_text_buffer                                       -     245    +245
file_insert                                          312     420    +108
next_tabstop                                           -      82     +82
text_hole_make                                       154     171     +17
do_cmd                                              5093    5100      +7
static.cmd_mode_indicator                              -       5      +5
refresh                                             1248    1253      +5
current_filename                                       -       4      +4
yank_delete                                          161     164      +3
what_reg                                              96      99      +3
end_cmd_q                                             78      81      +3
char_insert                                          440     442      +2
readonly_mode                                          -       1      +1
vi_readonly                                            1       -      -1
setops                                               154     153      -1
readonly                                               1       -      -1
vi_setops                                              4       1      -3
string_insert                                        161     158      -3
cfn                                                    4       -      -4
show_status_line                                     532     514     -18
readit                                               519     500     -19
move_to_col                                          161     138     -23
vi_main                                              495     433     -62
isblnk                                                75       -     -75
.rodata                                             4751    4655     -96
edit_file                                            892     787    -105
new_text                                             125       -    -125
update_ro_status                                     131       -    -131
colon                                               3848    3667    -181
------------------------------------------------------------------------------
(add/remove: 5/6 grow/shrink: 8/10 up/down: 485/-848)        Total: -363
bytes
   text    data     bss     dec     hex filename
  34751     873    4260   39884    9bcc busybox_old
  34439     877    4260   39576    9a98 busybox_unstripped

ifconfig: make it work with ifaces with ifnames > 255

remove accumulated stray trailing whitespace

Modify method of linking against libs. Now we fisrt try all
specified libs, and if it succeeds, we try to remove them
one-by-one. If link succeeds, then library is thrown out.
Should solve the problem with SELinux linking in libsepol
even when not needed.

fix discrepancy in GPL version number. Pointed out by "Marsh David" <dmarsh@bigw.com.au>

top: nested function allows us to reuse some code
(not everyone likes them - but code does get smaller).

display_generic                                        -     761    +761
static.fmt_100percent_8                                -     111    +111
fmt_100percent_8                                     101       -    -101
display_status                                      1489     581    -908
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 0/1 up/down: 872/-1009)        Total: -137 bytes
   text    data     bss     dec     hex filename
 677020    3344   13936  694300   a981c busybox_old
 676876    3344   13936  694156   a978c busybox_unstripped

top: make "100%" case less ugly, and shrink code while at it
fmt_100percent_8                                       -     101    +101
.rodata                                           129185  129153     -32
display_status                                      1726    1489    -237
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 101/-269)         Total: -168 bytes
   text    data     bss     dec     hex filename
 677180    3344   13936  694460   a98bc busybox_old
 677020    3344   13936  694300   a981c busybox_unstripped

top: simpler loadavg processing
display_status                                      1787    1726     -61
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-61)             Total: -61 bytes
   text    data     bss     dec     hex filename
 677244    3344   13936  694524   a98fc busybox_old
 677180    3344   13936  694460   a98bc busybox_unstripped

top: truncate usernames to 8 chars

grep: implement -m MAX_MATCHES; fix help text
grep_file                                            771     822     +51
packed_usage                                       22573   22610     +37
.rodata                                           128058  128090     +32
grep_main                                            842     853     +11
max_matches                                            -       4      +4
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/0 up/down: 135/0)             Total: 135 bytes

grep: fix buglets with context printing
print_line                                           152     170     +18
did_print_line                                         -       1      +1
grep_file                                            788     771     -17
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/1 up/down: 19/-17)              Total: 2 bytes
   text    data     bss     dec     hex filename
 673368    2740   13968  690076   a879c busybox_old
 673368    2740   13968  690076   a879c busybox_unstripped

ash: make "jobs | cat" work like in bash (was giving empty output)

adduser: close /etc/{passwd,shadow} before calling passwd etc.
Spotted by Natanael Copa <natanael.copa@gmail.com>

vi: make status line less confusing when we open non-readable files,
require rood to use w! when saving non-writable files.
Patch by Natanael Copa <natanael.copa@gmail.com>

update_ro_status                                       -      73     +73
edit_file                                            819     822      +3
colon                                               3440    3425     -15
.rodata                                           128090  128058     -32
file_insert                                          288     235     -53
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/3 up/down: 76/-100)           Total: -24 bytes
   text    data     bss     dec     hex filename
 673344    2740   13968  690052   a8784 busybox_old
 673320    2740   13968  690028   a876c busybox_unstripped

xioctl and friends by Tito <farmatito@tiscali.it>

function                                             old     new   delta
do_iptunnel                                          203     977    +774
process_dev                                         5328    5494    +166
ioctl_or_perror                                        -      54     +54
ioctl_or_perror_and_die                                -      51     +51
ioctl_alt_func                                         -      49     +49
bb_ioctl_or_warn                                       -      47     +47
do_add_ioctl                                         102     145     +43
bb_xioctl                                              -      39     +39
print_value_on_off                                     -      31     +31
get_lcm                                              105     123     +18
arp_main                                            2155    2167     +12
..................
zcip_main                                           1576    1566     -10
setlogcons_main                                       92      82     -10
dumpkmap_main                                        263     253     -10
do_get_ioctl                                          85      75     -10
setkeycodes_main                                     165     154     -11
write_table                                          244     232     -12
vconfig_main                                         318     306     -12
do_del_ioctl                                          93      81     -12
set_address                                           75      62     -13
maybe_set_utc                                         30      16     -14
loadfont_main                                        495     479     -16
slattach_main                                        712     695     -17
do_loadfont                                          191     174     -17
do_iplink                                           1155    1136     -19
getty_main                                          2583    2562     -21
fbset_main                                          2058    2035     -23
do_time                                              588     565     -23
xioctl                                                25       -     -25
read_rtc                                             186     160     -26
parse_conf                                          1299    1270     -29
udhcp_read_interface                                 269     239     -30
bb_ioctl                                              45       -     -45
bb_ioctl_alt                                          70       -     -70
bb_ioctl_on_off                                       78       -     -78
.rodata                                           129370  129018    -352
do_show                                              799       -    -799
------------------------------------------------------------------------------
(add/remove: 6/5 grow/shrink: 13/49 up/down: 1316/-1864)     Total: -548 bytes
   text    data     bss     dec     hex filename
 675352    2740   13968  692060   a8f5c busybox_old
 674804    2740   13968  691512   a8d38 busybox_unstripped

ash: small size optimization
function                                             old     new   delta
makejob                                              263     270      +7
setjobctl                                            328     332      +4
jobscmd                                               96      94      -2
stoppedjobs                                           53      50      -3
jobctl                                                 4       1      -3
job_warning                                            4       1      -3
forkshell                                            644     641      -3
cmdloop                                              422     409     -13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/6 up/down: 11/-27)            Total: -16 bytes
   text    data     bss     dec     hex filename
 675392    2740   13968  692100   a8f84 busybox_old
 675380    2740   13968  692088   a8f78 busybox_unstripped

ash: recognize -l as --login equivalent; do not recognize +-login

ash: fix for buglet in DEBUG code (Nguyen Thai Ngoc Duy <pclouds@gmail.com>)

FAQ: add timezone Q

nc: minor code shrink

function                                             old     new   delta
dolisten                                             731     737      +6
tmtravel                                              32      21     -11
catch                                                 75      64     -11
oprint                                               272     229     -43
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 6/-65)             Total: -59 bytes
   text    data     bss     dec     hex filename
 676698    3340   13936  693974   a96d6 busybox_old
 676650    3340   13936  693926   a96a6 busybox_unstripped

remove last source id

add support for --symbol-prefix/-P

fix applet order error

md5_sha1_sum: fix mishandling when run as /bin/md5sum (with path)
chown/chgrp: completely match coreutils 6.8 wrt symlink handling

function                                             old     new   delta
recursive_action                                     411     422     +11
arith                                               2033    2042      +9
collect_blk                                          467     474      +7
dhcprelay_main                                      1122    1125      +3
fsck_main                                           1909    1911      +2
singlemount                                         4555    4547      -8
xmalloc_realpath                                      14       -     -14
get_lcm                                              123     105     -18
ed_main                                             3111    3084     -27
chown_main                                           217     183     -34
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 5/4 up/down: 32/-101)           Total: -69 bytes
   text    data     bss     dec     hex filename
 684132    2744   14000  700876   ab1cc busybox_old
 684060    2744   14000  700804   ab184 busybox_unstripped

udhcp: many small fixes:
* arpping(): smaller and even probably fixed
* lots of variables/params converted: ulong -> uint32_t
* uptime() nuked in favor of monotonic_sec()
* udhcp_get_packet(): only one "bad vendor", simplify

function                                             old     new   delta
reservedIp                                            36      35      -1
udhcpc_main                                         2462    2460      -2
addStaticLease                                        64      62      -2
static.broken_vendors                                 16       -     -16
uptime                                                19       -     -19
udhcpd_main                                         1273    1238     -35
udhcp_get_packet                                     223     184     -39
.rodata                                           144162  144106     -56
arpping                                              690     609     -81
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/7 up/down: 0/-251)           Total: -251 bytes
   text    data     bss     dec     hex filename
 734241    3028   14400  751669   b7835 busybox_old
 734005    3028   14400  751433   b7749 busybox_unstripped

correct_password: if password is 'x' or '*' and there is no shadow, use
fake encrypted password 'aa' (which is guaranteed to fail password check).

ifupdown: kill -TERM is default, so drop -TERM
ifupdown: ferror() does not set errno, don't use perror
ifupdown: make netmask parsing smaller and more strict
(was accepting 255.0.255.0, 255.1234.0.0 etc...)

function                                             old     new   delta
count_bits                                            36       -     -36
execute                                             2573    2535     -38
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/1 up/down: 0/-74)             Total: -74 bytes
   text    data     bss     dec     hex filename
 684204    2744   14000  700948   ab214 busybox_old
 684132    2744   14000  700876   ab1cc busybox_unstripped

correct_password: do not print "no shadow passwd..." message

function                                             old     new   delta
correct_password                                     204     191     -13
.rodata                                           129530  129466     -64
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-77)             Total: -77 bytes
   text    data     bss     dec     hex filename
 675984    2744   13968  692696   a91d8 busybox_old
 675908    2744   13968  692620   a918c busybox_unstripped

ping: fix non-fancy ping6

devfsd: futher sanitization by Tito <farmatito@tiscali.it>

expr: small code shrink

devfsd: indentation fixes

find: fix build failure on certain configs
(found by Cristian Ionescu-Idbohrn <cristian.ionescu-idbohrn@axis.com>)

find: style fix

ps: revert wrong "optimization": (i & 1) -> i

fix comment placement (no code changes)

udhcp: new config option "Rewrite the lease file at every new acknowledge"
       (Mats Erik Andersson <mats@blue2net.com> (Blue2Net AB))
udhcp: consistently treat server_config.start/end IPs as host-order
       fix IP parsing for 64bit machines
       fix unsafe hton macro usage in read_opt()
       do not chdir("/") when daemonizing
       fix help text

ps: fix "unused variable" warning; fix integer variable declared as char.

web site: announce 1.6.1

top,ps: improve /proc/PID/cmdinfo reading code

function                                             old     new   delta
display_status                                         -    1231   +1231
read_cmdline                                           -     101    +101
parse_conf                                          1284    1303     +19
arith                                               2033    2042      +9
collect_blk                                          467     474      +7
fsck_main                                           1909    1911      +2
dhcprelay_main                                      1125    1122      -3
singlemount                                         4555    4547      -8
read_close                                            50      36     -14
get_lcm                                              123     105     -18
ed_main                                             3111    3084     -27
func_args                                             73      28     -45
procps_scan                                          732     658     -74
top_main                                            2187     899   -1288
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 4/8 up/down: 1369/-1477)       Total: -108 bytes
   text    data     bss     dec     hex filename
 676048    2744   13968  692760   a9218 busybox_old
 675940    2744   13968  692652   a91ac busybox_unstripped

add bb_basename.c

introduce and use bb_basename()

function                                             old     new   delta
bb_basename                                            -      26     +26
sv_main                                             1226    1225      -1
passwd_main                                         1985    1983      -2
showdirs                                             482     478      -4
sendCgi                                             1811    1807      -4
make_device                                         1354    1350      -4
handleIncoming                                      2443    2439      -4
func_name                                             82      78      -4
service_name                                        2292    2285      -7
main                                                 909     901      -8
cmp_main                                             555     547      -8
test_main                                            434     422     -12
act                                                  228     216     -12
find_pair                                            180     164     -16
rmmod_main                                           298     280     -18
find_pid_by_name                                     156     134     -22
modprobe_main                                       1606    1576     -30
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/16 up/down: 26/-156)         Total: -130 bytes
   text    data     bss     dec     hex filename
 734933    3028   14400  752361   b7ae9 busybox_old
 734801    3028   14400  752229   b7a65 busybox_unstripped

killall, pidof: use argv0 for process matching too
top: show cmdline, not comm field
(fixes problems with re-execed applets showing as processes with name "exe",
and not being found by pidof/killall by applet name)

function                                             old     new   delta
find_pid_by_name                                      98     156     +58
procps_scan                                          692     732     +40
top_main                                            2724    2762     +38
find_pair                                            164     180     +16
collect_int                                          114     123      +9
cmp_main                                             547     555      +8
collect_fork                                         112     119      +7
collect_ctx                                          112     119      +7
read_package_field                                   253     257      +4
passwd_main                                         1983    1985      +2
process_stdin                                        435     433      -2
xstrtoul_range_sfx                                   229     226      -3
get_next_block                                      1852    1849      -3
arith                                               2042    2033      -9
sv_main                                             1236    1226     -10
singlemount                                         4690    4672     -18
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 10/6 up/down: 189/-45)          Total: 144 bytes
   text    data     bss     dec     hex filename
 734789    3028   14400  752217   b7a59 busybox_old
 734933    3028   14400  752361   b7ae9 busybox_unstripped

procps: shrink /proc scanning code a bit

function                                             old     new   delta
skip_fields                                           16      15      -1
.rodata                                           144266  144258      -8
procps_scan                                          739     692     -47
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/3 up/down: 0/-56)             Total: -56 bytes
   text    data     bss     dec     hex filename
 734845    3028   14400  752273   b7a91 busybox_old
 734789    3028   14400  752217   b7a59 busybox_unstripped

document firmware support

wget: fix bug in base64 encoding (bug 1404). +10 bytes.

devfsd: style cleanup; size reduction (Tito <farmatito@tiscali.it>)
traceroute: suppress warning

uuencode: shrink

function                                             old     new   delta
uuencode_main                                        427     337     -90
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-90)             Total: -90 bytes
   text    data     bss     dec     hex filename
 734981    3028   14400  752409   b7b19 busybox_old
 734889    3028   14400  752317   b7abd busybox_unstripped

devfsd: fix formatting (Tito <farmatito@tiscali.it>)
ash: fix SEGV if type has zero parameters

Consolidate ARRAY_SIZE macro; remove one unneeded global var (walter harms <wharms@bfs.de>)

- need to pass the PATH down to the gcc-version check to be able to find the correct cc.
  Fixes make PATH="$CROSS_BIN:$PATH" CROSS_COMPILE=foo- like invocations that previously failed to resolve since the information about the path set by the user was lost.

test: suppress gcc warning
telnetd: do not use suferfluous static variable.

httpd: NOMMU fixes by Alex Landau <landau_alex@yahoo.com>

pidof: size optimizations (-50 bytes)

- handy to have the cross_compile block here, too

syslogd: do not convert tabs to ^I

test: shrink a bit

function                                             old     new   delta
test_main                                              5     434    +429
bb_test                                              473       -    -473
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/0 up/down: 429/-473)          Total: -44 bytes
   text    data     bss     dec     hex filename
 735073    3028   14408  752509   b7b7d busybox_old
 735029    3028   14408  752465   b7b51 busybox_unstripped

build system: remove kernel .config locations (spotted by walter harms <wharms@bfs.de>)

random shrinkage of statics, -60 bytes saved

tar: improve OLDGNU compat, make old SUN compat configurable

- add ATTRIBUTE_UNUSED_RESULT for internal use

since we removed the deprecated matches() now and thus not alot of warnings are currently seen, let's strive to fixup these:
- warn a little bit about unused results

- remove matches() from networking/. Untested.
   text    data     bss     dec     hex filename
   1705       0       0    1705     6a9 networking/libiproute/utils.o.orig
   1676       0       0    1676     68c networking/libiproute/utils.o
    766       0       0     766     2fe networking/libiproute/rtm_map.o.orig
    670       0       0     670     29e networking/libiproute/rtm_map.o
   4942       0       0    4942    134e networking/libiproute/iptunnel.o.orig
   4687       0       0    4687    124f networking/libiproute/iptunnel.o

slattach: code shrink (Bernhard Fischer <rep.dot.nop@gmail.com>)

remove extra ')'

slattach: new applet.

- move iprule and ipaddress from matches() to index_in_str_array
   text    data     bss     dec     hex filename
   2544       0       0    2544     9f0 networking/libiproute/iprule.o.oorig
   2356       0       0    2356     934 networking/libiproute/iprule.o
   6481       0       0    6481    1951 networking/libiproute/ipaddress.o.oorig
   6464       0       0    6464    1940 networking/libiproute/ipaddress.o

do not do utime() on links, it acts on link targets, and we don't want that.
rename link_name to link_target, less confusing this way.

- remove another user of the deprecated matches() func by moving it to use index_in_str_array. Untested.
   text    data     bss     dec     hex filename
    445       0       4     449     1c1 ip_parse_common_args.o.oorig
    391       0       4     395     18b ip_parse_common_args.o

- do not hardcode HOSTCFLAGS to gcc specific flags. Fixes errors when not using gcc as HOSTCC

- strndupa is a GNU extension. Using strdup to avoid several errors like:
  util-linux/mdev.c:(.text+0x29a): undefined reference to `strndupa'

echo: fix yet another buglet in non-fancy echo

ping: fix incorrect handling of -I (Iouri Kharon <bc-info@styx.cabel.net>)

find: -context support for SELinux (KaiGai Kohei <kaigai@kaigai.gr.jp>)
find: make it a bit smaller

function                                             old     new   delta
.rodata                                           129018  129050     +32
parse_params                                        1509    1346    -163
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 32/-163)          Total: -131 bytes