packaging: sysusers and cleanup
- provide upstream sysusers file
- use it for declarative user/group specification in Arch
- omit using it in deb/rpm for the moment (to support older distros)
- more PKGBUILD cleanup, get rid of install script
- use better permissions for
/etc/knot-resolver
in rpm - conform with deb and arch (root:root 0755) - revert tmpfiles back to knot-resolver:knot-resolver, since we fixed issue mentioned in f0045fed (we no longer drop capabilities as root)