Update to Transmission-1.50.

All Platforms
 * IPv6 support for peers, and for trackers with explicit IPv6 addresses
 * Improved connectivity for encrypted peers
 * Fix 1.42 error that made tracker announces slower over time
 * Fix a Mac-centric peer connection bug from 1.41
 * Use less CPU cycles when managing very fast peers
 * Better handling of non-UTF-8 torrent files
 * When removing local data, only remove data from the torrent
 * Close potential DoS vulnerability in 1.41
 * Many other bugfixes
GTK+
 * Various usability improvements
 * Better Gnome HIG compliance in the statusbar, properties dialog, and more
Daemon
 * Lots of new options added to transmission-remote
 * Fix 1.42 whitelist bug
 * Make i18n support optional for cli and daemon clients
CLI
 * Support session.json settings, just as the Daemon and GTK+ clients do
Web Interface
 * Torrents can now be added by URL
 * Add the ability to "remove local data" from the web client


(tnn)