Adds global NOINDEX,NOFOLLOW meta to site headers

mediawiki-nofollow

## Adds global NOINDEX,NOFOLLOW  meta to site headers
$wgExtensionFunctions[] = 'globalNoIndex';
function globalNoIndex(){
   global $wgOut;
   $wgOut->addMeta ( 'ROBOTS' , 'NOINDEX,NOFOLLOW') ;                                                                                                                                        
}