add warning log in AutoCompactRange(), when there is not enough disk space left to exec compact task (#722)

reduce redis_cli send timeout to avoid block PikaHeartbeatThread when destructor PikaBinlogSender (#711)

fix the 'operation not permitted' error when rsync --daemon is NOT executed by root for rsync > 3.1 (#287)

* v2.3.4

* bugfix srandmember acts differently with redis

remove unnecessary member variables in binlog sender

* fix migrate big key and add auth for semi-async

* pipeline recv() for improving migration performance

* bugfix binlog sender confict at multi-network interface

* bugfix configing set maxclients has no effect

* set resource
       limits