Diskless replication documented inside example redis.conf.
Remove duplicated log message about starting BGSAVE.
Diskless sync delay is now configurable.
Document repl-diskless-sync-delay in redis.conf.
Diskless replication: log BGSAVE delay only when it is non-zero.
Added a function to get slave name for logs.
Use new slave name function for diskless repl reporting.
Log slave ip:port in more log messages.