proxy: add connection pool
proxy: add test proxy
proxy: fix bug in wlog
proxy: add atomic counter to pool
proxy: update pool
proxy: wlog add CallerName
proxy: update log of pool.go
proxy: add mbuf
proxy: pool use int64
redis: add cached_sockfd map to server
redis: rename command & add slotsmgrtone
proxy: add atomic
proxy: add benchmark
proxy: implement mpool & mbuf, but reader is extremely slow
proxy: add alloc/reuse counter in mpool
proxy: speedup
proxy: remove crc16
redis: format command response, fix bug
redis: update error code for migrate
proxy: update args