Update redis to 2.6.13.

--[ Redis 2.6.13 ]

UPGRADE URGENCY: MODERATE, nothing very critical but upgrading is suggested
                 if you experienced:

                 1) Strange issues with Lua scripting.
                 2) Not reconfigured reappearing master using Sentinel.
                 3) Server continusly trying to save on save error.

                 This version of Redis may also help with AOF and slow / busy
                 disks and latency issues.

* [FIX] Throttle BGSAVE attempt on saving error.
* [FIX] redis-cli: raise error on bad command line switch.
* [FIX] Redis/Jemalloc Gitignore were too aggressive.
* [FIX] Test: fix RDB test checking file permissions.
* [FIX] Sentinel: always redirect on master->slave transition.
* [FIX] Lua updated to version 5.1.5. Fixes rare scripting issues.
* [NEW] AOF: improved latency figures with slow/busy disks.
* [NEW] Sentinel: turn old master into a slave when it comes back.
* [NEW] More explicit panic message on out of memory.
* [NEW] redis-cli: --latency-history mode implemented.

--[ Redis 2.6.12 ]

UPGRADE URGENCY: MODERATE, nothing very critical but a few non trivial bugs.

* [BUGFIX]   redis-cli --bigkeys: don't crash with empty DB.
* [BUGFIX]   stop-writes-on-bgsave-error now works in redis.conf
* [BUGFIX]   Don't crash at startup if RDB is there but can't be opened.
* [BUGFIX]   Initial value for master_link_down_since_seconds is now huge.
* [BUGFIX]   Allow SELECT while loading the DB.
* [BUGFIX]   Don't replicate/AOF an empty MULTI/EXEC if the transaction
             is empty or containing just read-only commands.
* [BUGFIX]   EXPIRE should not be able to resurrect keys (see issue #1026).
* [IMPROVED] Extended SET back ported from Redis 2.8 / unstable
             See http://redis.io/commands/set for more information.
* [IMPROVED] Test suite improved.

--[ Redis 2.6.11 ]

UPGRADE URGENCY: LOW, however updating is encouraged if you have many instances
                 per server and you want to lower the CPU / energy usage.

* [BUGFIX]   Replication: more strict error checking for master PING reply.
* [BUGFIX]   redis-cli: use keepalive socket option for improved reliability.
* [BUGFIX]   Allow AUTH while loading the DB in memory.
* [BUGFIX]   Don't segfault on unbalanced quotes while parsing config file.
* [BUGFIX]   Don't segfault if command gets propagated to AOF / replication
             link as another command name that was renamed in redis.conf
* [IMPROVED] serverCron() frequency is now a runtime parameter (was REDIS_HZ).
* [IMPROVED] Use a lot less CPU when idle, even with many configured DBs.

--[ Redis 2.6.10 ]

UPGRADE URGENCY: MODERATE, this release contains many non-critical fixes
                 and many small improvements.

* [BUGFIX]   redis-cli --rdb, fixed when the server sends newlines to ping.
* [BUGFIX]   redis-cli, minor fixes on connection handling, prompt.
* [BUGFIX]   Slow log: don't log EXEC, just executed commands.
* [BUGFIX]   On failed shutdown don't try again and again compulsively.
* [BUGFIX]   Fix build on sunos without backtrace().
* [BUGFIX]   UNSUBSCRIBE and PUNSUBSCRIBE: always provide a reply (see 742e580)
* [BUGFIX]   Lua struct library was broken, upgraded.
* [BUGFIX]   Fix a bug in srandmemberWithCountCommand() with count argument.
* [BUGFIX]   Test: disable clients timeout to prevent issues on slow systems.
* [BUGFIX]   Sentinel: don't advertise the promoted slave as master too early.
* [IMPROVED] Whitelist SIGUSR1, see http://redis.io/topics/signals.
* [IMPROVED] Simpler to understand redis-cli --bigkeys output.
* [IMPROVED] Test now works with tclsh > 8.5.
* [IMPROVED] Added option to turn of the Nagle algorithm in slave socket.
* [IMPROVED] Optionally use SO_KEEPALIVE to detect dead peers.
Update innotop to 1.9.0.

2012-09-07: version 1.9.0

   Changes:
	* A new Health Dashboard (A) mode is the default mode.
	* Added a new InnoDB Locked (K) mode.
	* Added a new 'spark' config variable for sparklines.
	* Added a new fuzzy_time formatting function.
	* Added "query distill" summarizing.
	* Handled more types of errors connecting to the server.
	* Displayed some data more compactly.

   Bugs fixed:
   * Double-quotes were used to terminate strings in SQL (issue 57).
	* T mode didn't show InnoDB transaction times (issue 67).
	* Killing a query didn't suggest the longest-running one automatically.
	* Connections weren't closed on exit (issue 64).
	* Q mode didn't have connections in its header (issue 63).
	* Connections and server groups were poorly handled (issue 68).
	* The RPM spec file was buggy (issue 59).
	* Event filters were defined wrong (issue 54).

2012-02-25: version 1.8.1

   Bugs fixed:
   * Various parsing errors with MySQL 5.5 (issue 23, 45, 47, 51, 52, 53).
   * RPM spec file prevented building on CentOS 5.5 using mock (issue 44).
   * Tests worked only from the test subdirectory (issue 43).

2010-11-06: version 1.8.0

   Changes:
   * Don't re-fetch SHOW VARIABLES every iteration; it's too slow on many hosts.
   * Add a filter to remove EVENT threads in SHOW PROCESSLIST (issue 32).
   * Add a timestamp to output in -n mode, when -t is specified (issue 37).
   * Add a new U mode, for Percona/MariaDB USER_STATISTICS (issue 39).
   * Add support for millisecond query time in Percona Server (issue 39).
   * Display a summary of queries executed in Query List mode (issue 26).

   Bugs fixed:
   * Made config-file reading more robust (issue 41).
   * Hostname parsing wasn't standards compliant (issue 30).
   * MKDEBUG didn't work on some Perl versions (issue 22).
   * Don't try to get InnoDB status if have_innodb != YES (issue 33).
   * Status text from the InnoDB plugin wasn't parsed correctly (issue 36).
   * Transaction ID from InnoDB plugin wasn't subtracted correctly (issue 38).
   * Switching modes and pressing ? for help caused a crash (issue 40).
Update sphinxsearch to 2.0.8.

Changes in 2.0.8
   * fixed #1515, log strings over 2KB were clipped when
     query_log_format=plain
   * fixed #1514, RT index disk chunk lose attribute update on daemon
     restart
   * fixed #1512, crash while formatting log messages
   * fixed #1511, crash on indexing PostgreSQL data source with MVA
     attributes
   * fixed #1509, blend_chars vs incomplete multi-form and overshort
   * fixed #1504, RT binlog replay vs descending tid on update
   * fixed #1499, sql_field_str2wordcount actually is int, not string
   * fixed #1498, now working with exceptions starting with number too
   * fixed #1496, multiple destination keywords in wordform
   * fixed #1494, lost 'mod', '%' operations in select list. Also corrected
     few typers in the doc.
   * fixed #1490, expand_keywords vs prefix
   * fixed #1487, `id` in expression fixed
   * fixed #1483, snippets limits fix
   * fixed #1481, shebang config changes check on rotation
   * fixed #1479, port handling in PHP Sphinx API
   * fixed #1474, daemon crash at SphinxQL packet overflows max_packet_size
   * fixed #1472, crash on loading index to indextool for check
   * fixed #1465, expansion_limit got lost in index rotation
   * fixed #1427, #1506, utf8 3 and 4-bytes codepoints
   * fixed #1405, between with mixed int float values

Changes in 2.0.7
   * fixed #1475, memory leak in the expression parser
   * fixed #1457, error messages over 2KB were clipped
   * fixed #1454, searchd did not display an error message when the binlog
     path did not exist
   * fixed #1441, SHOW META in a query batch was returning the last
     non-batch error
   * fixed #1435, typo in the documentation
   * fixed #1430, rt_flush_period now works even with a disabled binlog
   * fixed #1427, overlong 4-byte UTF-8 codes in source text could cause
     indexer crashes or index corruption
   * fixed #1418, warnings from local index searches were lost with
     dist_threads>0
   * fixed #1417, crash handler now works on searchd startup stage, too
     (eg. to report index load time crashes)
   * fixed #1410, bad numerics like '123abc' now result in a proper
     SphinxQL error message
   * fixed #1404, a tiny memory leak in shared mutex
   * fixed #1394, race in --iostats caused incorrect I/O statistics in
     threaded modes
   * fixed #1391, QUORUM operator vs docinfo=inline returned wrong
     attribute values
   * fixed #1389, edge case in the ORDER operator caused occasionaly
     searchd crashes
   * fixed #1382, query parts with field limits but without real keywords
     (like '@name {') are now simply ignored and no longer cause a query
     syntax error
   * fixed #1370, Windows indexer builds failed to fetch rows from MSSQL
     2012
   * fixed #1368, ORDER BY RAND() did not work in RT indexes
   * fixed #1364, queries with hitless words could occasionally crash
     searchd
   * fixed #1363, '*' in charset_table was causing query syntax errors with
     enable_star=1
   * fixed #1353, added filtering by 'id' syntax (in addition to '@id') to
     SphinxSE
   * fixed #1346, fixed NEAR operator behavior vs duplicated keywords
   * fixed #1345, invalid PROXIMITY operator threshold now causes a query
     syntax error rather than unexpected search behavior
   * fixed #1343, misconfigured indexes with 0 full text fields are now
     explicitly forbidden
   * fixed #1342, specific error messages (from the preload stage) went
     missing when failing to load the indexes
   * fixed #1339, no warning on inconsistent word statistics
   * fixed #1335, typo in searchd help screen
   * fixed #1334, typo in SELECT documentation
   * fixed #1316, PHRASE operator did not match in a rare self-repeating
     document/query case
   * fixed #1297, letting queries complete gracefully instead of killing
     them off in seamless_rotate=1, workers=prefork case
   * fixed #1295, mentioned index naming requirements (proper identifier)
     in the FROM clause docs
   * fixed #1221, incorrect results when using @groupby in select list via
     SphinxAPI with compat_sphinxql_magics=0
   * fixed #1180, special SPZ chars occasionally leaking into snippets
   * fixed #1171, preforked children did not reload logs on SIGUSR1
   * fixed #1150, added support for `id` syntax in DELETE and parents in
     WHERE
   * fixed #1135, crashes when using MVA/strings attributes in expression
     ranker
   * fixed #1124, corrupted attributes after merging with an empty index
   * fixed #1090, SphinxSE snippets UDF updated to support MySQL 5.5
   * fixed #1041, added initial support for MVA updates (and other mutex
     protected things) on FreeBSD
   * fixed #999, fullscan returned empty result sets in mixed batches of
     fullscan and fulltext queries
   * fixed #921, document count/bytes 32bit overflow in indexer progress
     output
   * fixed #539, added processing suffix rules with dots in .affix file to
     spelldump
   * fixed #481, rotation did not work on Windows with preopen=1
   * fixed #268, added warnings about duplicate elements in xmlpipe2
   * fixed CSphStaticMutex (double initialization issue)
   * fixed documentation typo in SQL data sources
   * fixed too-late initialization of mutex at daemon
   * fixed that an instance of searchd resurrected by watchdog could leak
     resources and/or crash
   * added a console message about crashes during index loading at startup
   * added more debug info about failed index loading