Add script: kgb.sh

See merge request !9

Fix anonscm example URL.

See merge request !7

Useful when you want to reconfigure your projects to default to
debian/master instead of master to follow DEP-14. Beware that you can't
remove the branch which is currently the default branch. So you
have to do a multi-step process: create the new branch, update
the default branch, remove the old branch.

Right now it will drop the tag_push_events and merge_request_events that
were improperly set in a former version of those scripts.

Before this commit the check of $? checks the success of "echo" instead
of the "curl" call.

The package tracker uses the name of the git repository as the source
package name and it knows how to recognize git commit notices to tag
them with the vcs keyword.

anonscm.alioth.debian.org does not exist, anonscm.debian.org does.

Master

See merge request !2