Upgrade from 4.0.6 to 4.0.7.

<ChangeLog>

• Many 32 bit overflows were addressed in order to allow to use Redis with a very significant amount of data, memory size permitting. (zhaozhao.zz, Oran Agra)

• MEMORY USAGE fixed for the list type. (gnuhpc)

• Allow read-only scripts in Redis Cluster. (Salvatore Sanfilippo)

• Fix AOF pipes setup in edge case. (heqin)

• AUTH option for MIGRATE. (AlexStocks, Salvatore Sanfilippo, Fabio Nicotra)

• HyperLogLogs are no longer converted from sparse to dense in order to be merged. (Salvatore Sanfilippo)

• Fix AOF rewrite dead loop under edge cases. (heqin)

• Fix processing of large bulk strings (>= 2GB). (Oran Agra)

• Added RM_UnlinkKey in modules API. (Dvir Volk)

• Fix Redis Cluster crashes when certain commands with a variable number of arguments are called in an improper way. (Salvatore Sanfilippo)

• Fix memory leak in lazyfree engine. (zhaozhao.zz)

• Fix many potentially successful partial synchronizations that end doing a full SYNC, because of a bug destroying the replication backlog on the slave. So after a failover the slave was often not able to PSYNC with masters, and a full SYNC was triggered. The bug only happened after 1 hour of uptime so escaped the unit tests. (Oran Agra)

• Improve anti-affinity in master/slave allocation for Redis Cluster when the cluster is created. (Salvatore Sanfilippo)

• Improve output buffer handling for slaves, by not limiting the amount of writes a slave could receive. (Guy Benoish)

</ChangeLog>