gitask: remove subtask if a package already in task

- gitask: convert space(s) in messages to underscores
- rpmgs: improve update git repo from upstream

- rpmgs: add support for update of remotes branches
- rpmgs: update predownloaded in any case
- rpmgs: drop npm and node-gyp node modules from predownloaded
- rpmgs: check *.watch file in the root dir too
- rpmgs: empty version support
- fix 'major' define using
- rpmgs: add composer.json support

- use distro_info (ALT bug 37712)
- gitask: add -m <message> support for run and commit commands
- add p9 sources.list

- rpmbs: add .gear/postdownload-hook support (use git command to change files)
- rpmgs: skip repack for the same ext, just commit the file
- rpmgs: skip autoupdate if we run rpmgs with a version

- rpmgs: add watch file support (via rpm-uscan)
- rpmgs: check if we have no tag name to merge
- rpmgs: use rpm-uscan if we have .watch file really
- gitask: use last task for show as default
- git: allow any git.NAME
- gitask: rewrite add handling, add support for copy packages list

- rpmgs: add support for any version prefix in a git tag
- gitask: add copy command
- gitask: allow list packages and tasks
- rpmbs: add -F option to run task after add
- gitask: fix task cancel on git.eter/git.office
- gitask: add rebuild command