change-of-fork.md

1. now --install --update* --remove and --launcher can be use without detecting the backend
2. add a variable Installermode_Disabled to disable --install --update* --remove for packaging
3. add a man by help2man
4. add a script to auto-packaging .deb (I do not know if an auto rpm packager is possible, for openSUSE, Fedora... can have deference package name for dependency )
5. add a .deb. Depends is corrected as 'docker.io | podman', x11 dependency is in Recommends ,wayland dependency is in Suggest.