Update to Transmission-1.20.

All Platforms
+ Support https tracker connections
+ IP blocking using the Bluetack Level1 blocklist
+ Better support of multitracker torrents
+ Faster UPnP port mapping on startup
+ Ability to reset global statistics
+ Various bugfixes
GTK+
+ Inhibit hibernation when downloading
+ Use XDG basedir spec for configuration files
+ Various bug fixes and usability improvements
+ Vastly improved translations thanks to the Ubuntu translation team
+ Fix a couple of minor display issues (1.11)


(tnn)