Merge branch 'master' of scm.dev.nokia.troll.no:qt/qt-earth-staging into master-integration
* 'master' of scm.dev.nokia.troll.no:qt/qt-earth-staging:
Symbian socket: Implement systemProxyForQuery for service networks
tst_q3dns: update test to follow RFC-5952.
Doc: update platform notes on Mac to reflect WA_MacNoCocoaChildWindow (cherry picked from commit
b240f8a2ee3b7ff82a389fbf5dfd076792f385e8)
QT_USE_QSTRINGBUILDER to fix source compatibility
Make QHostAddress.toString() follow RFC-5952 for IPv6 address format.