v4.0

• Some refactoring of the SELinux relabelling code
• The SELinux relabelling code is now usable on non-transactional systems as well
• Split SELinux relabelling code into separate package
• Add automated testing of SELinux relabelling functionality
• Use multiple threads for SELinux relabelling
• Don't relabel in the zipl initrd "initgrub" mode
• 98selinux-microos: Avoid "/sysroot-selinux: not mounted" on new util-linux
• Install man-online alias only for bash
• Add man-online command
• Drop support for sle15 builds
• Add OBS CI workflow
• 98selinux-microos: Set mount propagation properly
• 98selinux-microos: Convert tabs to spaces
• 98selinux-microos: Don't include setenforce unnecessarily
• Add spec file
• systemd-proxy-env: fix typos in setup-systemd-proxy-env
• Bump version to 4.0 to have a higher version than the previous selinux-autorelabel