Revert "avoid using sendfile if tls-replication is enabled"
Revert "avoid using sendfile if tls-replication is enabled"

This reverts commit b9abecfc4c97db01fa6f09180c68a92ea5974ac1.

soloestoy/redis,yossigo/redis,antirez/redis,oranagra/redis,charsyam/redis,oranagra/redis,PKRoma/redis,yossigo/redis,yossigo/redis,charsyam/redis,soloestoy/redis,oranagra/redis,antirez/redis,soloestoy/redis,soloestoy/redis,ofirluzon/redis,ofirluzon/redis,antirez/redis,ofirluzon/redis,ctripcorp/redis,charsyam/redis,neomantra/redis,yossigo/redis,neomantra/redis,yossigo/redis,antirez/redis,PKRoma/redis,ofirluzon/redis,soloestoy/redis,ctripcorp/redis,PKRoma/redis,ctripcorp/redis,PKRoma/redis,charsyam/redis,charsyam/redis,oranagra/redis,neomantra/redis,ofirluzon/redis,PKRoma/redis,neomantra/redis,oranagra/redis,ctripcorp/redis,neomantra/redis