Version 1.1pre12 released.

Thanks to Etienne Dechamps, Rafał Leśniak, Vittorio Gambaletta, Martin Weinelt, Sven-Haegar Koch, Florian Klink, LunnarShadow, Dato Simó, Jo-Philipp Wich, Jochen Voss, Nathan Stratton Treadway, Pierre Emeriaud, xentec, Samuel Thibault and Michael Tokarev for their contributions to this version of tinc.