Update from 6.0.8 to 6.0.10.

<ChangeLog>

================================================================================
Redis 6.0.10     Released Tue Jan 12 16:20:20 IST 2021
================================================================================

Upgrade urgency MODERATE: several bugs with moderate impact are fixed,
Here is a comprehensive list of changes in this release compared to 6.0.9.

Command behavior changes:
* SWAPDB invalidates WATCHed keys (#8239)
* SORT command behaves differently when used on a writable replica (#8283)
* EXISTS should not alter LRU (#8016)
  In Redis 5.0 and 6.0 it would have touched the LRU/LFU of the key.
* OBJECT should not reveal logically expired keys (#8016)
  Will now behave the same TYPE or any other non-DEBUG command.
* GEORADIUS[BYMEMBER] can fail with -OOM if Redis is over the memory limit (#8107)

Other behavior changes:
* Sentinel: Fix missing updates to the config file after SENTINEL SET command (#8229)
* CONFIG REWRITE is atomic and safer, but requires write access to the config file's folder (#7824, #8051)
  This change was already present in 6.0.9, but was missing from the release notes.

Bug fixes with compatibility implications (bugs introduced in Redis 6.0):
* Fix RDB CRC64 checksum on big-endian systems (#8270)
  If you're using big-endian please consider the compatibility implications with
  RESTORE, replication and persistence.
* Fix wrong order of key/value in Lua's map response (#8266)
  If your scripts use redis.setresp() or return a map (new in Redis 6.0), please
  consider the implications.

Bug fixes:
* Fix an issue where a forked process deletes the parent's pidfile (#8231)
* Fix crashes when enabling io-threads-do-reads (#8230)
* Fix a crash in redis-cli after executing cluster backup (#8267)
* Handle output buffer limits for module blocked clients (#8141)
  Could result in a module sending reply to a blocked client to go beyond the limit.
* Fix setproctitle related crashes. (#8150, #8088)
  Caused various crashes on startup, mainly on Apple M1 chips or under instrumentation.
* Backup/restore cluster mode keys to slots map for repl-diskless-load=swapdb (#8108)
  In cluster mode with repl-diskless-load, when loading failed, slot map wouldn't
  have been restored.
* Fix oom-score-adj-values range, and bug when used in config file (#8046)
  Enabling setting this in the config file in a line after enabling it, would
  have been buggy.
* Reset average ttl when empty databases (#8106)
  Just causing misleading metric in INFO
* Disable rehash when Redis has child process (#8007)
  This could have caused excessive CoW during BGSAVE, replication or AOFRW.
* Further improved ACL algorithm for picking categories (#7966)
  Output of ACL GETUSER is now more similar to the one provided by ACL SETUSER.
* Fix bug with module GIL being released prematurely (#8061)
  Could in theory (and rarely) cause multi-threaded modules to corrupt memory.
* Reduce effect of client tracking causing feedback loop in key eviction (#8100)
* Fix cluster access to unaligned memory (SIGBUS on old ARM) (#7958)
* Fix saving of strings larger than 2GB into RDB files (#8306)

Additional improvements:
* Avoid wasteful transient memory allocation in certain cases (#8286, #5954)

Platform / toolchain support related improvements:
* Fix crash log registers output on ARM. (#8020)
* Add a check for an ARM64 Linux kernel bug (#8224)
  Due to the potential severity of this issue, Redis will print log warning on startup.
* Raspberry build fix. (#8095)

New configuration options:
* oom-score-adj-values config can now take absolute values (besides relative ones) (#8046)

Module related fixes:
* Moved RMAPI_FUNC_SUPPORTED so that it's usable (#8037)
* Improve timer accuracy (#7987)
* Allow '\0' inside of result of RM_CreateStringPrintf (#6260)

================================================================================
Redis 6.0.9     Released Mon Oct 26 10:37:47 IST 2020
================================================================================

Upgrade urgency: SECURITY if you use an affected platform (see below).
                 Otherwise the upgrade urgency is MODERATE.

This release fixes a potential heap overflow when using a heap allocator other
than jemalloc or glibc's malloc. See:
https://github.com/redis/redis/pull/7963

Other fixes in this release:

New:
* Memory reporting of clients argv (#7874)
* Add redis-cli control on raw format line delimiter (#7841)
* Add redis-cli support for rediss:// -u prefix (#7900)
* Get rss size support for NetBSD and DragonFlyBSD

Behavior changes:
* WATCH no longer ignores keys which have expired for MULTI/EXEC (#7920)
* Correct OBJECT ENCODING response for stream type (#7797)
* Allow blocked XREAD on a cluster replica (#7881)
* TLS: Do not require CA config if not used (#7862)

Bug fixes:
* INFO report real peak memory (before eviction) (#7894)
* Allow requirepass config to clear the password (#7899)
* Fix config rewrite file handling to make it really atomic (#7824)
* Fix excessive categories being displayed from ACLs (#7889)
* Add fsync in replica when full RDB payload was received (#7839)
* Don't write replies to socket when output buffer limit reached (#7202)
* Fix redis-check-rdb support for modules aux data (#7826)
* Other smaller bug fixes

Modules API:
* Add APIs for version and compatibility checks (#7865)
* Add RM_GetClientCertificate (#7866)
* Add RM_GetDetachedThreadSafeContext (#7886)
* Add RM_GetCommandKeys (#7884)
* Add Swapdb Module Event (#7804)
* RM_GetContextFlags provides indication of being in a fork child (#7783)
* RM_GetContextFlags document missing flags: MULTI_DIRTY, IS_CHILD (#7821)
* Expose real client on connection events (#7867)
* Minor improvements to module blocked on keys (#7903)

</ChangeLog>

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