Features:
- mget improve (idning)
- many new commands supported: LEX, PFADD, PFMERGE, SORT, PING, QUIT, XSCAN... (mattrobenolt, areina, idning)
- handle max open file limit(allenlz)
- log: add notice-log and use ms time in log(idning)
Fix:
- bug in string_compare (andyqzb)
- deadlock in sighandler (idning)
Others:
- add many Utils link like redis-mgr, smitty.