add get content listener parent and load cookie attributes to nsIURIContentListener Bug #21173 --> set the redirected flag on the channel if we are going to redirect the url. Add load cookie support. build nsDocLoader in the uriloader. r=travis git-svn-id: svn://10.0.0.236/trunk@59159 18797224-902f-48f8-a5cc-f745e15eee43