Clear request queue when channel disconnected
bugfix: socket channel reconnect
Merge pull request #98 from cloudwu/bugfix

Bugfix: socket channel reconnect
Rewrite socketchannel, make it clear.
Not use jemalloc on macosx, See Issue #99
fix makefile for better platform support
Merge pull request #100 from cloudwu/notusejemalloc

fix makefile for better platform support
remove malloc hook when disable jemalloc