* Merge from debian unstable (LP: #234766), remaining changes: - Enable detection of GNU screen as a mouse-capable terminal. - Add NoDisplay=true to gvim.desktop. - Drop vim-lesstif package and lesstif2-dev build-dependency. - Build-depend on libxt-dev. - Restore a number of Conflicts/Replaces and include /usr/share/man/ru.{KOI8-R,UTF-8}{,/man1}, both to help with upgrade problems from 6.06. - Enable Python interpreter on basic builds. - Create a .pot file for translations. - Disable autoindent, line-wrapping, and backup files by default. - Omni completion for Launchpad bugs.