* Debianization: - debian/control: - Priority, promote to optional; - Build-Depends-Indep field, introduce (build-indep scheme, see below); - build-arch/build-indep scheme, introduce and consolidate (Closes: #764903) (thanks to Aaron M. Ucko <ucko@debian.org> for the hint); - debian/patches/: - docs/doxygen.conf.in, update with `doxygen -u'. * Update patch for docs/doxygen.conf.in submitted to the upstream maintainer.