ifupdown.c: allow options to udhcpc to be configurable from .config

This allows more control over options that are passed to udhcpc
that are not configurable via /etc/network/interfaces.

Example: rather than quit when an initial lease isn't found,
you could use "--background" so that udhcpc keeps running and
continually attempts to get an ip.  That way, when you plug in
the ethernet after powering on the device, you'll still get an ip.

stat: fix compile breakage (get_f_fsid() is used even if !FEATURE_STAT_FORMAT)

libbb: sha_crypt -123 bytes

libbb/pw_encrypt_sha: -28 bytes

libbb: remove glibc-style bloat from sha_crypt. -1130 bytes.
cryptpw: add more difficult test vectors.

arp: stop using globals

function                                             old     new   delta
hw_set                                                 1       -      -1
arp_main                                            1559    1558      -1
sockfd                                                 8       4      -4
hw                                                     4       -      -4
device                                                 4       -      -4
ap                                                     4       -      -4
packed_usage                                       25402   25393      -9
------------------------------------------------------------------------------
(add/remove: 0/4 grow/shrink: 0/3 up/down: 0/-27)             Total: -27 bytes

gzip: fix gzip -dc case caused by using stale getopt state

seq: shrink by 10 bytes

correct help texts

telnetd: fix compile problem for non-standalone telnetd

- add support for seq -s <separator>

- add seq -w support (Natanael Copa)

modprobe-small: fix failure to load when no arguments are given
modutils-24: fix bad interaction of xzalloc with xrealloc_vector; style fixes

cksum, printenv: report errors via exitcode

function                                             old     new   delta
cksum_main                                           296     315     +19
printenv_main                                         74      86     +12

head: report file open errors with exitcode 1 (was happily returning 0)

head_main                                            409     417      +8

expr: on error, exit with exitcode 2

expr_main                                            101     110      +9

stat: make stat -f show filesystem "ID:" as coreutils does

print_statfs                                         358     370     +12

env: support -uVAR=VAL

function                                             old     new   delta
env_main                                             245     233     -12

du: fix "du /dir /dir" case

reset_ino_dev_hashtable                                -      84     +84
du                                                   388     376     -12
du_main                                              327     301     -26
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 84/-38)             Total: 46 bytes

runsvdir: straighten some convoluted code. logic is unchanged

telnetd: correctly output 0xff char. ~100 bytes.
telnet: fix some atrocious names and style. no code changes

libbb: disable a second md5 implementation which managed to creep in :)

function                                             old     new   delta
sha512_end                                           239     237      -2
sha256_end                                           162     160      -2
sha1_end                                             191     189      -2
md5_end                                              168     166      -2
__md5__magic                                           4       -      -4
md5_crypt                                            627     621      -6
static.S                                              16       -     -16
__md5_Init                                            42       -     -42
static.P                                              64       -     -64
__md5_Final                                          131       -    -131
__md5_Update                                         153       -    -153
static.C                                             268      12    -256
__md5_Transform                                      293       -    -293
------------------------------------------------------------------------------
(add/remove: 0/7 grow/shrink: 0/6 up/down: 0/-973)           Total: -973 bytes

webpage: announce 1.13.0 and 1.12.2

libbb: add optionl support for SHA256/512 encrypted passwords

function                                             old     new   delta
sha_crypt                                              -    2423   +2423
cryptpw_main                                         128     183     +55
to64                                                   -      29     +29
pw_encrypt                                           974    1000     +26
str_rounds                                             -      11     +11
login_main                                          1532    1541      +9
packed_usage                                       25215   25200     -15
__md5_to64                                            29       -     -29
------------------------------------------------------------------------------
(add/remove: 3/1 grow/shrink: 3/1 up/down: 2553/-44)         Total: 2509 bytes

sha256,sha512: new applets. +4.9kb
 we will require sha256/512 code for new $5$ and $6$ style
 password hashes anyway, they are showing up already
 in people's /etc/passwd...

Typo fixes

libbb: constify some data in sha1. gcc is clever enough to do it itself,
 thus no actual code changes. Also some pointless beautifuing crept in.

build system: reorder less' options in config so that
 they are properly indented

Bump version to 1.14.0.svn

Bump version to 1.13.0

update "maximum nommu" config

update random config tester

randomconfig fixes

telnetd: set SO_KEEPALIVE, users report it's useful. +20 bytes.

*: a bit of code shrink

function                                             old     new   delta
stop_handler                                          41      38      -3
sulogin_main                                         508     504      -4
got_cont                                               4       -      -4
cont_handler                                          11       -     -11
startservice                                         309     297     -12
processorstart                                       423     409     -14
tcpudpsvd_main                                      1861    1843     -18
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 0/5 up/down: 0/-66)             Total: -66 bytes

move documentation to docs/

kbd_mode: s/ioctl/xioctl. also saves 12 bytes

kbd_mode: support -C TTY option

function                                             old     new   delta
packed_usage                                       25334   25361     +27
kbd_mode_main                                        146     173     +27

build system: remove '-Wl,' when we pass flags to ld.

libbb: add a TODO to support new SHA-based encrypted passwords

login: fix /etc/nologin handling (should prohibit non-root LOGINS,
 not running login by non-root). minor code shrink.

function                                             old     new   delta
login_main                                          1669    1602     -67

telnetd: handle emacs M-DEL and IAC-NOP (putty keepalive)
 by Jim Cathey (jcathey AT ciena.com)

function                                             old     new   delta
telnetd_main                                        1314    1364     +50

defconfig: explain what we aim it to be

login: fix /etc/nologin support
build system: fix config warnings ("Overlong line")

function                                             old     new   delta
login_main                                          1735    1774     +39
__libc_tcdrain                                         -      23     +23
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/0 up/down: 62/0)               Total: 62 bytes

add mailutils/*

total overhaul of mail applets. again. Vladimir as usual.

correction in comment

sv: make default service dir configurable (Vladimir wants it)

runsvdir: alternative methon of supporting runsvdir-as-init. +66 bytes.
*: s/int/pid_t where appropriate

basename: fix error code. again. deja vu feeling...

*: remove superfluous casts. no code changes

build system: tidying up CONFIG_xxx names (suggested by Rob)

*: code shrink by adding a wrapper around very common tcsetattr(0, TCSANOW, xx) op

function                                             old     new   delta
tcsetattr_stdin_TCSANOW                                -      14     +14
set_sane_term                                        116     113      -3
top_main                                            1277    1273      -4
make_new_session                                     421     415      -6
rawmode                                              133     126      -7
reset_term                                            18      10      -8
die                                                   43      35      -8
cookmode                                              62      54      -8
vlock_main                                           425     415     -10
read_line_input                                     3165    3155     -10
bb_askpass                                           357     347     -10
fsck_minix_main                                     3079    3065     -14
getty_main                                          2375    2332     -43
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/12 up/down: 14/-131)         Total: -117 bytes

add serial HOWTO doc

inetd: fix a case when we have zero services

- commentary typo fix (tito)

- fix typo in print_user() (tito)

nslookup: tiny shrink (-5 bytes); add comment about res_init
inet_common: cosmetics, no code changes

less: fix pasting into search line ('/' cmd) -
 it was mishandled because pasting "types" very fast
 and read_key eats many chars. +30 bytes.

lineedit: fix bug 5824: Since version 23530 with lineedit.c,
 "fdisk" & "ed" can't work any more

add comment, no code changes

gunzip: restore mtime. approx +80 bytes of code
rpm: make code more robust
lsmod: small code shrink

tftpd: show help if stdin is not a socket

iplink: accept shorthands for "address" keyword here:
 "ip link set address 00:11:22:33:44:55"
ifupdown: use "addr" instead of "address"

less: fix newly-introduced case of less spinning forever
 on pty's closed etc

runsvdir: if we have PID == 1, SIGHUP should make small pause,
not 1 minute one

modprobe: fix a segfault when modprobe is called with no arguments at all

function                                             old     new   delta
modprobe_main                                        559     535     -24

kill[all[5]]: accept -s SIG too. kill_main: +29 bytes
 by Steve Bennett (steveb AT workware.net.au)

setup_environment: cd $HOME regardless of clear_env value.

tftpd: be less cryptic in help text

dc: support for bases 2 and 8, by Nate Case (ncase AT xes-inc.com)

function                                             old     new   delta
print_base                                            87     176     +89
set_output_base                                       81      95     +14
static.bases                                           -       5      +5
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/0 up/down: 108/0)             Total: 108 bytes

- minor shrinkage (~-60)

- support ip link set eth1 address 00:11:22:33:44:55
  and not only the shorthand "addr". Thanks to ncopa for noticing

randomconfig fixes

another small defconfig update

update defconfig

runsvdir: kill another global

runsvdir: fx a recent vda's buglet (was pausing even if not signaled).
 stop spawning children immediately if signaled. Kill one global.

id: better wording in comments, no code changes

runsvdir: shrink (by Vladimir)

runsvdir: do not exit if we are pid 1.

more whitespace fixes

whitespace fixes, no code changes

vi: fix uninitialized last_search_pattern (bug 5794)

id: coreutils compat by Tito + test script

- typo in documentation

ash: add testcase for bug 5304

ash: fix "while kill -0 $child; do true; done" looping forever.

udhcp: simplify SO_BINDTODEVICE call

ls: trim help text

ping: trivial code shrink

function                                             old     new   delta
ping6_main                                            31      30      -1
ping_main                                            405     370     -35

cpio: emit TRAILER even when hard links were found.
 by Pascal Bellard (pascal.bellard AT ads-lu.com)

devmem: fixlet in cleanup code

devmem: make it more script-friendly; don't do any reads
 and output nothing if writing was requested. -100 bytes

less: correctly wrap lines with tabs

devmem: new applet

less: FEATURE_LESS_LINENUMS depends on FEATURE_LESS_DASHCMD

read_key is actually written by Rob, add him to copyright notice

less: disable _ command, it's useless bloat

read_key: add comments how Shift and Meta keys looks like.
 no code changes