clarify help text
-rw-r--r-- 29 .gitignore
-rw-r--r-- 1313 COPYING
-rw-r--r-- 10553 git_mirror.py
-rwxr-xr-x 2684 githook.py
-rwxr-xr-x 3747 github-add-hooks.py
-rwxr-xr-x 1600 ssh-set-ident.sh
-rwxr-xr-x 4431 webhook-core.py
-rwxr-xr-x 2151 webhook.py