README update

* Add Solution for Build Fail on CentOS
README update
README update

* Add More Specific Performance Info
Bug Fix

* fixed a bug that will make CPU 100% after connect request being
rejected
Bug Fix

* fixed a possible memory leak when connection rejected by remote
README update

* typo, orz..
Stability Improvement

* shutdown connection immedietaly if addrtype unknown
config.h Description Improvement
reorganized codes
delete useless files