proxy: add utils, wlog
proxy: add crc16 hash function
proxy: update Makefile, about vinfo
proxy: add .vgen.sh to generate version.go
redis: use crc32 as default hash function, copy from go(hash/crc32)
redis: set HASH_SLOTS_SIZE=1024
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