Solve bnc#857372 (and its various duplicates) by a major clean up and fix of the systemd unit files for CUPS that makes it again simple and secure to get cupsd working again as it did all the time in the past by a single simple and secure cups.service unit file. For experienced users cups.socket and cups.path are still provided as templates in /usr/share/doc/packages/cups/systemd/ so that experienced users can derive their own cups.socket and cups.path files according to their particular needs. When cupsd again "just works" as it did all the time in the past, then the next step is an optional systemd generator to create cups.socket that matches cupsd.conf see bnc#861084.
OBS-URL: https://build.opensuse.org/request/show/215537
OBS-URL: https://build.opensuse.org/package/show/Printing/cups?expand=0&rev=274
