Flush append only buffers before existing.
Flush append only buffers before existing.

when SHUTDOWN command is recived it is possible that some of the recent
command were not yet flushed from the AOF buffer, and the server
experiences data loss at shutdown.

pmem/redis,charsyam/redis,oranagra/redis,oranagra/redis,spinlock/redis,GitHubMota/redis,yossigo/redis,neomantra/redis,nnog/redis,ctripcorp/redis,neomantra/redis,nnog/redis,yossigo/redis,oranagra/redis,antirez/redis,ofirluzon/redis,yossigo/redis,yossigo/redis,soveran/redis,soveran/redis,rogerchina/redis,Sciumo/redis,PKRoma/redis,neomantra/redis,oranagra/redis,spinlock/redis,ctripcorp/redis,soloestoy/redis,soloestoy/redis,ofirluzon/redis,PKRoma/redis,antirez/redis,yossigo/redis,soloestoy/redis,spinlock/redis,neomantra/redis,ofirluzon/redis,GitHubMota/redis,charsyam/redis,ofirluzon/redis,PKRoma/redis,soveran/redis,oranagra/redis,nnog/redis,charsyam/redis,rogerchina/redis,ofirluzon/redis,nnog/redis,ctripcorp/redis,soloestoy/redis,soloestoy/redis,soveran/redis,rogerchina/redis,neomantra/redis,Sciumo/redis,pmem/redis,antirez/redis,Sciumo/redis,PKRoma/redis,GitHubMota/redis,Sciumo/redis,charsyam/redis,GitHubMota/redis,charsyam/redis,pmem/redis,rogerchina/redis,ctripcorp/redis,pmem/redis,antirez/redis,PKRoma/redis,spinlock/redis