The distribution specific Makefile target names begin with rh-. Switch
them to be use the distro agnostic dist-.
rh-dist-git-test and rh-dist-git are renamed to dist-git-test and
dist-git.
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
v2: Update to include jcline's newly added docs
v3: Clean up rh-help and rh-full-help output. I made all text conform
to 80 chars.