* Cherry-pick a few upstream commits: * f6b50e17 (create windows in detached session, closes: #466072). * 97708d58 (vertical split documentation, closes: #525998). * bb04008e (report session identifier on detach, closes: #199747). * Slightly adjust Homepage field. * Add support for build option 'noopt'. * Bump Standards version to 3.8.2, no changes. * Specify GPL version in d/copyright.