[jdev] Make Webjabber works for Gmail.com

[Zhong Li]

Talk.Google.com is used only when you create Socket connection. After that, real
domain is gmail.com, it also use Session Bind, so JID will be
webjabber at gmail.com/WebJabber+SessionID

I will wait until end of today. If nothing changed, I will update WebJabber site.

Also, if you have a local Jabber Client, you can set a host for gmail.com, set
IP same as talk.google.com(216.239.37.125), then you use email name as node,
gmail.com as server. This is easy way to handle it.