* Update README for gitlab migration
* Update configure.ac bug URL for gitlab migration
* Fix spelling/wording issues
* gitlab CI: add a basic build test
* man page: remove out-of-date COPYRIGHT section
* Reduce variable scopes as suggested by cppcheck
* Take care of -Wsign-compare warnings
OBS-URL: https://build.opensuse.org/package/show/X11:XOrg/showfont?expand=0&rev=8