add UserAgentFilter
add AuthFilter
refine AuthFilter
refine AuthFilter
refine AuthFilter
add [listen]username/password
Support locale of China and so on.

Goagent在中文界面下的ubuntu运行会报错，所以稍稍改了一下。
Merge pull request #1 from hyln9/patch-1

Support locale of China and so on.
refine window
backport 3.0.8 forward
refine proxy.ini for gtalk
refine FORWARD with clienthello
refine clienthello
refine FORWARD
add talkgadget.google.com
refine FORWARD
remote talkgadget.google.com =
disbale tcp cache
refine is_clienthello
handle set-cookie