Return ``True`` if directory <svc_path> is really a service:
    file <svc_path>/run exists and is executable

    svc_path
        the (absolute) directory to check for compatibility

def _is_svc(svc_path):
    '''
    Return ``True`` if directory <svc_path> is really a service:
    file <svc_path>/run exists and is executable

    svc_path
        the (absolute) directory to check for compatibility
    '''
    run_file = os.path.join(svc_path, 'run')
    if (os.path.exists(svc_path)
         and os.path.exists(run_file)
         and os.access(run_file, os.X_OK)):
        return True
    return False