add UDP support, and TCP listen support ipv6 now
If recv one udp message, try read next immediately rather than until next epoll_wait
remove unused code
bugfix: use ai_list instead of ai_hints
Merge branch 'udp' into dev
Merge branch 'dev'
add comment
Merge pull request #204 from cloudwu/dev

Dev
Update mongo.lua

mongo auth config
Merge pull request #207 from lmess/master

Update mongo.lua
Merge pull request #1 from cloudwu/master

sync