Diskless replication: set / reset socket send timeout.
Diskless replication: set / reset socket send timeout.

We need to avoid that a child -> slaves transfer can continue forever.
We use the same timeout used as global replication timeout, which is
documented to also affect I/O operations during bulk transfers.

JackieXie168/redis,JackieXie168/redis,JackieXie168/redis,JackieXie168/redis