In qtorrenthandle.cpp exception made caught by reference
In qbtsession.cpp exception made caught by reference

Conflicts:
	src/qtlibtorrent/qbtsession.cpp
In rssdownloadrule.{cpp,h} 'RssDownloadRule::operator==' made const.
In smtp.cpp fix 'ct' reassign.
In statsdialog.cpp fix initialization iEnd
In preferences.h now argument is const references