syslogd: support "symlink to symlink" for /dev/log; reduce stack usage

function                                             old     new   delta
create_socket                                          -     134    +134
syslogd_main                                        1132     865    -267
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 134/-267)         Total: -133 bytes
   text    data     bss     dec     hex filename
 775603     974    9420  785997   bfe4d busybox_old
 775445     974    9420  785839   bfdaf busybox_unstripped

- commentary fixes
- use common exit sequence for failure path:
   text    data     bss     dec     hex filename
    308       0       0     308     134 libbb/xreadlink.o.pgf
    296       0       0     296     128 libbb/xreadlink.o

xmalloc_follow_symlinks() -- fix ELOOP issue with absolute paths,
return full path in cases where path doesn't resolve to a link.
change name to better differentiate from xmalloc_readlink().

xreadlink: code shrink
udhcp: add missing tryagain member to client_config

function                                             old     new   delta
xmalloc_readlink_follow                              169     154     -15
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-15)             Total: -15 bytes

follow symlinks to find the true passwd file before updating.

new xmalloc_readlink_follow() routine to fully expand trailing symlinks
to get to a "real" file (or directory).

add "-A N" / "--tryagain=N" option to client, to allow altering the
default 60 second wait after failure to get a lease.

flush typeahead before prompt

login: fix PAM login (was unable to complete Kerberos login)

modprobe: fix a bug where we were entering endless loop
syslogd: strip trailing '\n' too, not only NULs

login: clear dangerous environment variables if started by non-root

fbset: fix buglet where we were using wrong pointer
readahead: stop using stdio.h
*: style fixes

telnet: use poll, it's shorter
*: style fixes

unzip: hmm... gcc doesn't like ATTRIBUTE_PACKED?? Document that...

insmod: make error reporting less verbose

telnetd: fix problem with zombies (by Paul Fox <pgf@brightstareng.com>)
syslogd: strip trailing NULs

change safety check on zip header to allow for extra length, and
revert the header read to use the correct constant rather than
sizeof.  at least one version of gcc (armv4-linux-gcc-3.4.1) pads
the struct to 28 bytes in spite of the packing.

swaponoff: prevent arithmetic overflow (spotted by Paul Fox <pgf@brightstareng.com>)

fix incorrect text of link-time error message. No code changes

webpage: fix typo, remove inconsistent trailing dots
Makefile: version is 1.9.0.svn now

update screenshot

Announce 1.8.0

docs: fix new-applet-HOWTO.txt, delete ipv4_ipv6.txt (it's obsolete)

Announce 1.7.3 on website

ifconfig: code shrink
adjtimex: code shrink
libbb: move nth_string function into libbb
hdparm: nth_string was here

   text    data     bss     dec     hex filename
 730013   10334   12032  752379   b7afb busybox_old
 730093   10134   12032  752259   b7a83 busybox_unstripped

grep: fix -Fo

insmod: code shrink, stop exporting insmod_ng_main.

function                                             old     new   delta
add_ksymoops_symbols                                   -     421    +421
static.section_names                                  20      40     +20
lsmod_main                                           425     424      -1
set_tainted                                          153     150      -3
main_opts                                              4       -      -4
obj_symbol_patch                                      47      42      -5
obj_string_patch                                     144     139      -5
already_loaded                                       144     138      -6
check_dep                                            348     341      -7
append_option                                         75      68      -7
obj_allocate_commons                                 515     501     -14
new_process_module_arguments                        1039    1018     -21
arch_new_symbol                                       31       9     -22
check_module_name_match                               85      61     -24
obj_create_alloced_section                           164     136     -28
include_conf                                         930     902     -28
modprobe_main                                       1643    1535    -108
obj_load                                             924     777    -147
insmod_ng_main                                       245       -    -245
insmod_main                                         4122    3794    -328
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 1/16 up/down: 441/-1003)       Total: -562 bytes
   text    data     bss     dec     hex filename
 776020     974    9420  786414   bffee busybox_old
 775384     974    9420  785778   bfd72 busybox_unstripped

inetd: fix bug 1562 "inetd does not set argv[0] properly" (fix by IlyaPanfilov)
inetd: code shrink while at it

function                                             old     new   delta
static.SOCK_xxx                                        -       6      +6
getconfigent                                        1222    1123     -99
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/1 up/down: 6/-99)             Total: -93 bytes
   text    data     bss     dec     hex filename
 776099     974    9420  786493   c003d busybox_old
 776020     974    9420  786414   bffee busybox_unstripped

hdparm: code shrink

   text    data     bss     dec     hex filename
 776494     974    9420  786888   c01c8 busybox_old
 776099     974    9420  786493   c003d busybox_unstripped

e2fsprogs: code shrink

   text    data     bss     dec     hex filename
 776594     974    9420  786988   c022c busybox_old
 776494     974    9420  786888   c01c8 busybox_unstripped

- fix typo in helptext

minor fix in comment, no code changes

ll_types.c: optimize link type table, make it conditional
            on FEATURE_IP_RARE_PROTOCOLS

function                                             old     new   delta
static.arphrd_name                                     -     373    +373
static.arphrd_type                                     -     124    +124
ll_type_n2a                                           58      78     +20
static.arphrd_names                                  496       -    -496
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 1/0 up/down: 517/-496)           Total: 21 bytes
   text    data     bss     dec     hex filename
 776880     974    9420  787274   c034a busybox_old
 776594     974    9420  786988   c022c busybox_unstripped

appletlib.c: make it actally follow _BB_SUID_ALWAYS rules
adduser: implement -S and code shrink / fix uid selection
*: sanitize getspnam_r use

   text    data     bss     dec     hex filename
 777042     974    9676  787692   c04ec busybox_old
 776883     974    9676  787533   c044d busybox_unstripped

syscall: code shrink

   text    data     bss     dec     hex filename
 777209     974    9676  787859   c0593 busybox_old
 777042     974    9676  787692   c04ec busybox_unstripped

mount: size-optimize mount_options[] and nfs_errtbl[]

 777253     974    9676  787903   c05bf busybox_old
 777209     974    9676  787859   c0593 busybox_unstripped

ash: if tcgetattr(stdin) fails, don't mess with tcsetattr
ash: size-optimize ulimit's table of limits

   text    data     bss     dec     hex filename
 777345     974    9676  787995   c061b busybox_old
 777253     974    9676  787903   c05bf busybox_unstripped

svlogd: fix compat problem: svlogd -tt should timestanp stderr too

httpd: fix trivial bug (spotted by Alex Landau)

bzip2: make -d actually work

bb_askpass: handle Ctrl-C, restore termoios on Ctrl-C.
sulogin: remove alarm handling, as it is redundant there.
code shrink. After all differences cancel out:

   text    data     bss     dec     hex filename
 777543    1000    9532  788075   c066b busybox_old
 777543    1000    9532  788075   c066b busybox_unstripped

read_line_input: fix it to not do any fancy editing if echoing is disabled.
ash: make read handling both more correct and smaller

read_line_input                                     4037    4101     +64
input_backward                                       140     139      -1
readcmd                                             1079    1070      -9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/2 up/down: 65/-10)             Total: 54 bytes
   text    data     bss     dec     hex filename
 777575    1000    9532  788107   c068b busybox_old
 777629    1000    9532  788161   c06c1 busybox_unstripped

more fixes for help text wrt long options

website: add link to "No ifup" document

ping: fix breakage from -I fix
passwd: SELinux support by KaiGai Kohei <kaigai@ak.jp.nec.com>

kbd_mode: new applet by Loïc Grenié <loic.grenie@gmail.com>

kbd_mode_main                                          -     189    +189
packed_usage                                       22745   22833     +88
applets                                             3132    3144     +12
static.opts                                            7      12      +5
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/0 up/down: 294/0)             Total: 294 bytes
   text    data     bss     dec     hex filename
 777210    1000    9532  787742   c051e busybox_old
 777575    1000    9532  788107   c068b busybox_unstripped

mkswap: selinux support by KaiGai Kohei <kaigai@ak.jp.nec.com>

paing: make -I ethN work too (-I addr already worked)

unzip: add a comment explaining why we don't die

unzip: fix endianness bugs

httpd: free big buffer after use; improve grep-ability of 'headers' variable

xatonum.h: add comment
lineedit: fix typo in comment
httpd: support for proxying connection to other http server
(by Alex Landau <landau_alex@yahoo.com>)

more of usage text fixes wrt long options

exclude --longopts from usage texts if those are disabled

snv add setsebool

telnetd: make sure telnetd -K exits if child dies

telnetd: trivial optimization

ash: use fdprintf, not dprintf.
*: trailing whitespace removed

bzip2: more of code shrink

compressStream                                       503     473     -30
BZ2_bzCompress                                        78       -     -78
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 0/1 up/down: 0/-108)           Total: -108 bytes
   text    data     bss     dec     hex filename
 676300    2538   12104  690942   a8afe busybox_old
 676192    2538   12104  690834   a8a92 busybox_unstripped

another fix for build failure found by randomconfig

even more fixes from randomconfig runs

fixes revealed by randomconfig run

telnetd: fix comment

telnetd: code shrink suggested by Ralf Friedl <Ralf.Friedl@online.de>

bzip2: move state pointer to the offset 0 (smaller code)
ifdef out DecompressEnd if FEATURE_CLEAN_UP is not seleted

fallbackSort                                        1655    1672     +17
mainSort                                            2447    2458     +11
bzip2_main                                           109     119     +10
.rodata                                           123466  123469      +3
generateMTFValues                                    433     435      +2
handle_compress                                      355     356      +1
BZ2_bzCompress                                        79      78      -1
prepare_new_block                                     55      48      -7
compressStream                                       547     503     -44
sendMTFValues                                       2225    2140     -85
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 6/4 up/down: 44/-137)           Total: -93 bytes
   text    data     bss     dec     hex filename
 676421    2538   12104  691063   a8b77 busybox_old
 676328    2538   12104  690970   a8b1a busybox_unstripped

bzip2: make -s equivalent to -2 (compatible with standard bzip2)
telnetd: typo fix in comment

telnetd: at Alexander Kriegisch <Alexander@kriegisch.name> insistence
add an option to close sessions as soon as child exits.
Maybe it should be a CONFIG option. OTOH, maybe it should be always on,
as it mimics, say, getty's behaviour.

function                                             old     new   delta
handle_sigchld                                         -      49     +49
telnetd_main                                        1312    1355     +43
.rodata                                           123429  123466     +37
packed_usage                                       22770   22806     +36
make_new_session                                     525     532      +7
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 4/0 up/down: 172/0)             Total: 172 bytes
   text    data     bss     dec     hex filename
 676285    2538   12104  690927   a8aef busybox_old
 676421    2538   12104  691063   a8b77 busybox_unstripped

telnetd: document bug in remove_iacs. reinstate band-aid
which was making it near-impossible to trigger.
remove memmove call which was happening at each network read,
and in 99%+ cases was not needed. Unfortunately, +50 bytes.

telnetd: some simplifications and better error hadling.
telnetd: don't SIGKILL child when closing the session.
kernel will seng SIGHUP for us.

static.iacs_to_send                                    -      15     +15
.rodata                                           123418  123429     +11
make_new_session                                     549     525     -24
send_iac                                              26       -     -26
free_session                                         144     118     -26
telnetd_main                                        1303    1261     -42
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 1/3 up/down: 26/-118)           Total: -92 bytes
   text    data     bss     dec     hex filename
 676341    2538   12104  690983   a8b27 busybox_old
 676234    2538   12104  690876   a8abc busybox_unstripped

bzip2: update help text

bzip2: implement -1..-9 command line flags

bzip2: eliminate some divisions

remove trailing whitespace

setsebool: new applet (Yuichi Nakamura <ynakam@hitachisoft.jp>)

httpd: fix bug where we were trying to read more POSTDATA than content-length

bzip2: code size shrink

bzip2: remove files which are not used anymore

bzip2: size reduction, to just below 9k.

bzip2: port bzip2 1.0.4 to busybox. note: bzip2 code resides
in separate directory (archival/bz/*)
and is covered by BSD-style license.
code size: 13k

whitespace/style fix

mt: eliminate vector of structures with pointers (bad for libbusybox).
It's a win for static build too:

function                                             old     new   delta
opcode_name                                            -     213    +213
opcode_value                                           -      68     +68
mt_main                                              281     256     -25
opcodes                                              280       -    -280
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 0/1 up/down: 281/-305)          Total: -24 bytes
   text    data     bss     dec     hex filename
 767403     974    9420  777797   bde45 busybox_old
 767224     974    9420  777618   bdd92 busybox_unstripped

stty: incorporate strings into struct instead of keeping pointers there.

static:
   text    data     bss     dec     hex filename
 767535     974    9420  777929   bdec9 busybox_old
 767403     974    9420  777797   bde45 busybox_unstripped

dynamic -fpic:
   text    data     bss     dec     hex filename
 718954   14030   12032  745016   b5e38 busybox_old
 720278   12534   12032  744844   b5d8c busybox_unstripped

vi: don't wait 50 ms before reading ESC sequences
inetd,syslogd: use safe_read instead of open-coded EINTR handling
syslogd: bail out if you see null read from Unix socket
(should never happen, but if it does, spinning forever
and eating 100% CPU is not a good idea)

trim too verbose help texts

fix a problem with two different applet_name's

add -fvisibility=hidden to CC flags, mark XXX_main functions
EXTERNALLY_VISIBLE. 5% size reduction of libbusybox.so

add -fpic to CC flags when we build libbusybox (14% smaller .so)

bunzip: small code shrink and consmetics

read_bunzip                                          276     283      +7
get_bits                                             184     162     -22
get_next_block                                      1833    1810     -23
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 7/-45)             Total: -38 bytes

ip tunnel parameter parsing fix by Jean Wolter <jw5@os.inf.tu-dresden.de>

Move applets/applet.c into libbb, allows to get rid of --whole-archive
(smaller code). Tested in static and shared mode.

get rid of global "struct bb_applet *current_applet"

trylink: s/strip/$STRIP/g

typo fix in help text

trylink: trivial cleanup

trylink: reformat link flags for readability
trylink: add --sort-section alignment:
    text           data     bss     dec     hex filename
-   6557            428    3260   10245    2805 busybox
+   6555            428    3260   10243    2803 busybox
- 909621           1076   12108  922805   e14b5 libbusybox.so.1.8.0.svn
+ 908868           1050   12016  921934   e114e libbusybox.so.1.8.0.svn

trylink: remove useless redirects, add missing error checks

trylink: trivial fixes

make "individual applets" build less noisy.
add *.tmp to list of files deleted by make mrproper.

whitespace fix

add libbb/appletlib.c