* Add patch to (hopefully) build also on architectures without sigsegv recovery support. * Add local cdbs snippet upstream-tarball.mk (in preparation for upstream perhaps actually releasing their code as tarball some day). * Resolve all build-dependencies using cdbs, and cleanup duplicates. * Properly avoid installing tunconfig twice (we want it as example script only). * Quote only copyrights and licenses in debian/copyright (not GPL addresses that lintian complains about).