Lua: Add bitop

A few people have written custom C commands because bit
manipulation isn't exposed through Lua.  Let's give
them Mike Pall's bitop.

This adds bitop 1.0.2 (2012-05-08) from http://bitop.luajit.org/

bitop is imported as "bit" into the global namespace.

New Lua commands: bit.tobit, bit.tohex, bit.bnot, bit.band, bit.bor, bit.bxor,
bit.lshift, bit.rshift, bit.arshift, bit.rol, bit.ror, bit.bswap

Verification of working (the asserts would abort on error, so (nil) is correct):
127.0.0.1:6379> eval "assert(bit.tobit(1) == 1); assert(bit.band(1) == 1); assert(bit.bxor(1,2) == 3); assert(bit.bor(1,2,4,8,16,32,64,128) == 255)" 0
(nil)
127.0.0.1:6379> eval 'assert(0x7fffffff == 2147483647, "broken hex literals"); assert(0xffffffff == -1 or 0xffffffff == 2^32-1, "broken hex literals"); assert(tostring(-1) == "-1", "broken tostring()"); assert(tostring(0xffffffff) == "-1" or tostring(0xffffffff) == "4294967295", "broken tostring()")' 0
(nil)

Tests also integrated into the scripting tests and can be run with:
./runtest --single unit/scripting

Tests are excerpted from `bittest.lua` included in the bitop distribution.
Update redis_init_script.tpl

status command currently reports success when redis has crashed and the pid file still exists. Changing to check the actual process is running.
FIXED redis-benchmark's idle mode.With idle mode shouldn't create write event
Fix function prototype in redis-cli.c.

Fix function prototype in redis-cli.c.
Fix zero-ordering SORT when called against lists

People mostly use SORT against lists, but our prior
behavior was pretending lists were an unordered bag
requiring a forced-sort when no sort was requested.

We can just use the native list ordering to ensure
consistency across replicaion and scripting calls.

Closes #2079
Closes #545 (again)
Fix redis-trib import SCAN call
Reconnect redis-cli when cluster return "moved"

    if redis works in cluster-mode and redis-cli was run with argv, reconnect if needs.
    example:
    ./redis-cli set foo bar

    if return is MOVED redis-cli just do nothing.
Typo fixes in redis.conf

Fix two typos in redis.conf:

- "trnasfers" --> "transfers"
- "enalbed" --> "enabled"
sds.c: Correct some comments
sds.c/sdscatvprintf: set va_end to finish va_list cpy
sds.c: Correct two spelling mistakes in comments
override histfile from env - fixes #831 and copies #833
Support daemon supervision by upstart or systemd

Both upstart and systemd provide a way for daemons to
be supervised, as well as a mechanism for them to
signal their readyness status.

This patch provides compatibility with this functionality while
not interfering with other methods.

With this, it will be possible to use `expect stop` with upstart
and `Type=notify` with systemd.

A more detailed explanation of the mechanism can be found here:
http://spootnik.org/entries/2014/11/09_pid-tracking-in-modern-init-systems.html
Merge pull request #1662 from mattsta/lua-add-bitops

Lua: Add bitop
Lua: add cjson scripting test

Two simple decode tests added mainly to check that
the 'cjson' global gets registered and is usable.
Lua: Upgrade cjson to 2.1.0 (2012-03-01)

The new cjson has some improvements over our current version including
increased platform compatability, a new resource limit to restrict
decode depth, and better invalid number handling.

One minor change was required to deps/Makefile because this version
of cjson doesn't export itself globally, so we added a quick little
define of -DENABLE_CJSON_GLOBAL.

cjson now has an optional higher performing float parsing interface,
but we are not including it (g_fmt.c, dtoa.c) because it requires
endianness declaration during compile time.

This commit is exactly lua_cjson.c from 2.1.0 with one minor
change of altering the two Lua includes for local search
instead of system-wide importing.
Lua: Use Redis solaris compatability for cjson too

cjson calls isinf, but some Solaris versions don't have isinf
even with the attempted fix we have in deps/Makefile.

We can harmlessly include the Redis solarisfixes.h header to
give cjson proper isinf.

Note: cjson has a compile-time setting for using their own defined
isinf, but the Redis definition in solarisfixes.h is more complete.

Fixes antirez#1620
Lua: remove new warning added by cjson header

clang doesn't like "extern inline" when no definition
is given right away.
Lua: upgrade cmsgpack to 0.4.0

Main reasons for upgrade:
  - Remove a warning when building Redis
  - Add multi pack/unpack
  - Improve memory usage and use Lua allocator properly
  - Fix some edge case encoding/decoding bugs
Lua: add cmsgpack scripting tests

Basically: test to make sure we can load cmsgpack
and do some sanity checks to make sure pack/unpack works
properly.  We also have a bonus test for circular encoding
and decoding because I was curious how it worked.