MONITOR: Add a new option to control resolv.conf monitoring
    
    For those use-cases where resolv.conf will never exist the new
    'monitor_resolv_conf' option can be set to false to skip the retry loop
    which tries to set the inotify watcher.
    
    Signed-off-by: Samuel Cabrero <scabrero@suse.de>
    
    Reviewed-by: Sumit Bose <sbose@redhat.com>