small code readability and typo fixes

lpr and lpq applets by Walter Harms.

   text    data     bss     dec     hex filename
    392       0       0     392     188 lpq.o
   1378       0       0    1378     562 lpr.o
    142       0       0     142      8e parse_prt.o

ash: s/ckzmalloc/ckzalloc/

ash: sprinkle a bit more of zeroed allocations.

httpd: "HEAD" support. Closes bug 1530.

send_file_and_exit                                   629     645     +16
static.request_HEAD                                    -       5      +5
handle_incoming_and_exit                            2732    2737      +5
send_headers                                         594     597      +3
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 3/0 up/down: 29/0)               Total: 29 bytes
   text    data     bss     dec     hex filename
 796283     740    7484  804507   c469b busybox_old
 796312     740    7484  804536   c46b8 busybox_unstripped

corrected English in comment

udhcp: we were forgetting to set right op byte in tha packet
for DHCPDECLINE. Fixing, and making code smaller.

udhcp: make paths configurable
syslogd: trivial build fix

libbb: introduce and use nonblock_safe_read(). Yay!
Our shells are immune from this nasty O_NONBLOCK now!

function                                             old     new   delta
nonblock_safe_read                                     -      78     +78
file_get                                             276     295     +19
generateMTFValues                                    428     435      +7
read_line_input                                     1776    1772      -4
preadbuffer                                          543     450     -93
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/2 up/down: 104/-97)             Total: 7 bytes
   text    data     bss     dec     hex filename
 615190     715   23924  639829   9c355 busybox_old
 615168     715   23924  639807   9c33f busybox_unstripped

[#1334] exec script for devices even if they dont have device nodes

ash: introduce and use stzalloc and ckzalloc.

function                                             old     new   delta
stzalloc                                               -      29     +29
ckzalloc                                               -      29     +29
recordregion                                         108     102      -6
cmdlookup                                            158     152      -6
pipeline                                             188     181      -7
parseheredoc                                         135     128      -7
makename                                              42      35      -7
list                                                 355     348      -7
setvareq                                             221     212      -9
aliascmd                                             324     311     -13
pushfile                                              83      69     -14
readtoken1                                          2872    2849     -23
parse_command                                       1430    1391     -39
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/11 up/down: 58/-138)          Total: -80 bytes
   text    data     bss     dec     hex filename
 577227     706   23740  601673   92e49 busybox_old
 577147     706   23740  601593   92df9 busybox_unstripped

trivial fixes to config system

ash: fix fallout from "A=1 B=$A; echo $B" code.

microcom: tiny shrink, adding comments

init: make it NOMMU-capable
httpd: trivial compile fix

init: fix comments

init: HUP should not be temporarily set to "restart",
we use it for config reload, and we have QUIT for "restart".

fix chat CONFIG_xxx dependencies

chat: now with "svn add"

findfs,mount: trivial build fix and whitespace fiexs

tar: optional autodetection of gz/bz2 compressed tarballs.
+130 bytes. Closes bug 992.

init: fix bug 1111: restart actions were not splitting words:

::restart:/sbin/rc restart
resulted in:
exec of '/sbin/rc restart' failed: No such file or directory

syslogd: tighten up hostname handling.

tail: fix "tail -c 20 /dev/huge_disk" (was taking ages)
tail: a few variables renamed
wc: tiny optimization.

chat: new applet by dronnikov AT gmail.com. With all options on:

function                                             old     new   delta
chat_main                                              -    1230   +1230
unescape                                               -     135    +135
packed_usage                                       23802   23922    +120
signal_handler                                       123     131      +8
input_backward                                       123     128      +5
applet_names                                        1775    1780      +5
applet_main                                         1076    1080      +4
applet_nameofs                                       538     540      +2
exitcode                                               -       1      +1
------------------------------------------------------------------------------
(add/remove: 3/0 grow/shrink: 6/0 up/down: 1510/0)           Total: 1510 bytes

lineedit: tiny shrink

support for mount by label (not yet tested)
Also adds findfs applet. Closes bug 1143.

- fix open(creat) without a mode

mount: with -vv -f, say what mount() calls we were going to make

 782357     728    7476  790561   c1021 busybox_old
 782429     728    7476  790633   c1069 busybox_unstripped

mount: optional support for -vv verbosity
mount: do "struct globals" trick

With -vv on:

function                                             old     new   delta
verbose_mount                                          -      83     +83
mount_main                                           970     988     +18
mount_it_now                                         219     229     +10
singlemount                                         4564    4570      +6
mount_option_str                                     227     233      +6
nfs_mount_version                                      1       -      -1
fslist                                                 4       -      -4
------------------------------------------------------------------------------
(add/remove: 1/2 grow/shrink: 4/0 up/down: 123/-5)            Total: 118 bytes

mount: recognize "dirsync" (closes bug 835)
mount: sanitize environ if called by non-root
*: adjust for slightly different sanitize routine

whitespace fixes

dos2unix: shrink

bloatcheck for last four commits:
function                                             old     new   delta
xrename                                                -      38     +38
md5_hash_block                                       437     458     +21
sv_main                                             1237    1254     +17
update_status                                        569     580     +11
decode_format_string                                 795     805     +10
doset                                                317     326      +9
passwd_main                                         1070    1074      +4
sha1_compile                                         447     446      -1
rename_or_warn                                        49      47      -2
fill_bounds                                          174     172      -2
buffer_fill_and_print                                 76      73      -3
bb_perror_nomsg                                        9       -      -9
get_next_block                                      1810    1795     -15
patch_main                                          1107    1085     -22
write_status_file                                   1123    1077     -46
remove                                                52       -     -52
__GI_remove                                           52       -     -52
open_as_user                                         171     111     -60
microcom_main                                        811     747     -64
dos2unix_main                                        452     383     -69
------------------------------------------------------------------------------
(add/remove: 1/3 grow/shrink: 6/10 up/down: 110/-397)        Total: -287 bytes

crontab: stop using remove() - use unlink() instead

dpkg: fix bug where existence check was reversed

libbb: introduce and use xrename and rename_or_warn.

microcom: maintainer update

mount: make -f work even without mtab support
(Cristian Ionescu-Idbohrn <cristian.ionescu-idbohrn at axis.com>)

libbb: introduce bb_signals and bb_signals_recursive,
which sets same handler for many signals. sig_catch is nuked
(bb_signals_recursive is more descriptive name).
*: use them as appropriate.

function                                             old     new   delta
bb_signals_recursive                                   -      95     +95
bb_signals                                             -      52     +52
run_command                                          258     273     +15
svlogd_main                                         1368    1377      +9
runsv_main                                          1746    1752      +6
runsvdir_main                                       1643    1646      +3
UNSPEC_print                                          64      66      +2
time_main                                           1128    1127      -1
...
resize_main                                          246     210     -36
sig_catch                                             63       -     -63
set_fatal_sighandler                                  85      14     -71
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 5/24 up/down: 182/-548)        Total: -366 bytes

crontab: clear env if run by non-root, so that we can use PATH now
crontab: make "-c /tmp/ -e" work

*: more readable handling of pipe fds. No code changes.

ifupdowm: shrink

ifupdown_main                                       2170    2459    +289
find_iface_state                                      57      56      -1
next_word                                             63      58      -5
popen2                                               350       -    -350
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/2 up/down: 289/-356)          Total: -67 bytes

random s/short/int/

add_cmd                                             1189    1190      +1
xconnect_ftpdata                                     118     117      -1
data_align                                            86      84      -2
process_files                                       2101    2096      -5
forkexec                                            1345    1334     -11

crontab: almost complete rewrite
crontab: make options consistent with other implementations

   text    data     bss     dec     hex filename
   2042       4       0    2046     7fe busybox.t1/miscutils/crontab.o
   1331       0       0    1331     533 busybox.t2/miscutils/crontab.o

function                                             old     new   delta
edit_file                                            733     956    +223
open_as_user                                           -     171    +171
packed_usage                                       23652   23650      -2
CDir                                                   8       4      -4
ChangeUser                                           139       -    -139
crontab_main                                        1522     616    -906
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 1/3 up/down: 394/-1051)        Total: -657 bytes

ifupdown: code shrink

function                                             old     new   delta
next_word                                             78      63     -15
ifupdown_main                                       2381    2170    -211
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-226)           Total: -226 bytes

adduser: optional support for long options. +110 bytes.
closes bug 2134.

ash: handle "A=1 A=2 B=$A; echo $B". closes bug 947.

we need to pass back the rtc device name that was actually used so that we can turn around and check its sysfs status

fix build failure when long opts are enabled

split some rtc funcs out of hwclock and into an rtc header/lib so that the new rtcwake applet as well as hwclock can utilize the same code

sendmail is lexically after selinux, so fix the order

add a test case for usage strings to catch people forgetting to add trailing escape in middle of usage

fix microcom usage

tar: real support for -p. +200 if selected.
By Natanael Copa <natanael.copa at gmail.com>

libbb: filename completion should match dangling symlinks too

ash: explain why "set -o BOGUS" doesn't abort

ash: make ash -c 'if set -o barfoo 2>/dev/null; then echo foo; else echo bar; fi' work
(fixes bug 1142)

function                                             old     new   delta
options                                              551     565     +14
ash_main                                            1397    1411     +14
setcmd                                                77      90     +13
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 3/0 up/down: 41/0)               Total: 41 bytes

build system: pass CFLAGS to link stage too (closes bug 1376)

umount: instead of non-standard -D, use -d with opposite meaning
  (closes bug 1604)
umount: do not try to free loop device or erase mtab if remounted ro
umount: do not complain several times about the same mountpoint

function                                             old     new   delta
umount_main                                          646     638      -8
packed_usage                                       23662   23652     -10
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-18)             Total: -18 bytes

typo fix

tar: do "short EOF" compat only if CONFIG_DESKTOP.
ash: add a comment about new minor bug

add ',' and 'gg' commands (patch from Leo Jay)

reinstate redir.tests with correct perms

ash: add a testcase for recently fixed signal bug

tar: compat: handle tarballs with only one zero block at the end

switch_root: stop at first non-option. Closes bug 1425.

tar: move FNM_LEADING_DIR #define to tar.c - no other users.
Closes bug 1332.

cp: add ENABLE_FEATURE_VERBOSE_CP_MESSAGE. Closes bug 1470

mkswap: fix help text to not lie about supported options.
mkswap: use uint32, not int, to match kernel.
mkswap: optimization: use pre-zeroed buffer

sort: -z outputs NUL terminated lines. Closes bug 1591.

syslogd: send '\n'-terminated messages over the network.
fully closes bug 1574. +8 bytes.

build system: don't use -o /dev/null, old gcc can delete /dev/null!

website: add direct links to every last stable release tarball

website: fix English

Announce 1.9.1

msh: stop trying to parse variables in "msh SCRIPT VAR=val param".
They should be passed as ordinary parameters.

msh: instead of fixing "ls | cd", "cd | ls" etc just disallow
  builtins in pipes. They make no sense there anyway.
msh: shrink umask builtin.

function                                             old     new   delta
execute                                             2508    2509      +1
doset                                                326     317      -9
forkexec                                            1370    1345     -25
doumask                                              165     101     -64
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/3 up/down: 1/-98)             Total: -97 bytes

ash: fix warning about _GNU_SOURCE being redefined, fix typo in comment.

msh: shrink, mainly by using smallints

function                                             old     new   delta
synio                                                251     263     +12
filechar                                             310     315      +5
subgetc                                              781     785      +4
brkcontin                                            106     109      +3
...
yylex                                                981     976      -5
execute                                             2513    2508      -5
waitfor                                              321     315      -6
onintr                                               103      97      -6
doset                                                332     326      -6
doexec                                               186     180      -6
yyparse                                               65      57      -8
thenpart                                             135     126      -9
forkexec                                            1379    1370      -9
onecommand                                           457     433     -24
newtp                                                 52      28     -24
command                                             1086    1061     -25
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 7/23 up/down: 27/-163)         Total: -136 bytes

msh: do not run pipes where last command is a builtin
msh: code shrink and some renames for better readability

httpd: fix bug where we did chdir("") if CGI path had only one "/".
httpd: fix bug 2004: wrong argv when interpreter is invoked

+8 bytes growth

- shrink a tiny bit (-30Bytes)

- spelling fixes

hush: die_sllep needs restoring only if job control is on

hush: close-on-exec interactive_fd

hush: set CLOEXEC on script file being executed

hush: fix the comment

hush: reset die_sleep to 0 in child after fork

getpot: add support for "a+" specifier for nonnegative int parameters.
By Vladimir Dronnikov <dronnikov at gmail.com>.
fdisk and top are converted as an example.

function                                             old     new   delta
getopt32                                            1340    1370     +30
top_main                                            1137    1120     -17
fdisk_main                                          3033    2949     -84
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 30/-101)           Total: -71 bytes

microcom: read more than 1 byte from device, if possible

ash: fix "orwell bug" 1984. Testcase:
    trap_handler() {
        echo trap
    }
    trap trap_handler USR1
    sleep 3600 &
    while true; do wait; done

hush: small fixes to docs/testsuite

hush: reinstate `cmd` handling for NOMMU (with fat big warning).
hush: fix a case where none of pipe members could be started
  because of fork failure
hush: rename functions: xxx_real -> xxx
hush: try to add a bit more of vfork-friendliness
hush: add rudimentary design docs
hush: add TODO (newly discovered bug with globbing)

microcom: compile fixes

microcom: split -d (delay) option away from -t

build system: make it do without od -t

mktemp: don't advertise -q option

mktemp: support -p DIR (Timo Teras <timo.teras at iki.fi>)

packed_usage                                       23595   23660     +65
mktemp_main                                          139     157     +18

test: fix mishandling of 'test ! arg1 op arg2 more args'; add testsuite

sendmail: update from maintainer