Merge remote-tracking branch 'nl6720/gpg-sender'
* nl6720/gpg-sender: .gitlab/ci/build_archiso.sh: use mkarchiso's -G option mkarchiso: support setting gpg sender mkarchiso: add some sane gpg options to override those set in user's gpg.conf
* nl6720/gpg-sender: .gitlab/ci/build_archiso.sh: use mkarchiso's -G option mkarchiso: support setting gpg sender mkarchiso: add some sane gpg options to override those set in user's gpg.conf