Log function

implement log() function.

mod/uimport.php

@@ -7,6 +7,7 @@
 use Friendica\App;
 use Friendica\Core\Config;
 use Friendica\Core\L10n;
+use Friendica\Core\Logger;
 use Friendica\Core\UserImport;
 
 function uimport_post(App $a)
@@ -33,7 +34,7 @@ function uimport_content(App $a)
 	if ($max_dailies) {
 		$r = q("select count(*) as total from user where register_date > UTC_TIMESTAMP - INTERVAL 1 day");
 		if ($r && $r[0]['total'] >= $max_dailies) {
-			logger('max daily registrations exceeded.');
+			Logger::log('max daily registrations exceeded.');
 			notice(L10n::t('This site has exceeded the number of allowed daily account registrations. Please try again tomorrow.') . EOL);
 			return;
 		}