- RHEL defines %{_sharedstatedir} to be %{_prefix}/com, so use a %global
        redirection to set the homedir to a proper value (/var/lib). Red Hat
        Bug #185862
    - add missing exit 0 to %pre
    - Update wiki UserAndGroups Url to the redirection target
    - create empty authorized_keys file for gitolite user
    - make homedir not world readable