add socketchannel:changhost
add socketchannel backup host
socketchannel backup support host/port
socketchannel backup support default port
fix typo
bugfix: socketchannel auth
don't support ip:port
config can read ENV
bugfix: connect auth
simplify code
bugfix: update the response fd, when the client reconnect
simplify clientsocket lib
mongo driver support rs
Merge pull request #137 from bttscut/mongors

mongo driver support rs
space to tab
Merge branch 'mongors' into dev
update history
Merge pull request #138 from cloudwu/config

config can read ENV
update history
remove dup line