Arvados

Our documentation says to do this:

    Services:
      GitSSH:
        ExternalURL: git@git.ClusterID.example.com:

"Make sure to include the trailing colon in Services.GitSSH.ExternalURL."

But "arvados-server config-check" doesn't like it:

transcoding config data: parse git@git.ce8i5.arvadosapi.com:: first path segment in URL cannot contain colon

Removing the trailing ":" is probably fine but the API server needs to add the ":" back in to "clone_urls". (Assumes anything accessing git is using clone_urls or fetch_url which seems reasonable.)