Change quoted column names to use backticks

sql/updates/4/199

@@ -11,10 +11,10 @@ sub DoUpdate($$$)
 
     if (!DBTableExists("subbosses")) {
 	DBQueryFatal( "CREATE TABLE subbosses (" .
-		     "  'node_id' varchar(32) NOT NULL default ''," .
-		     "  'service' varchar(20) NOT NULL default ''," .
-		     "  'subboss_id' varchar(20) NOT NULL default ''," .
-		     "  PRIMARY KEY  ('node_id','service')" .
+		     "  `node_id` varchar(32) NOT NULL default ''," .
+		     "  `service` varchar(20) NOT NULL default ''," .
+		     "  `subboss_id` varchar(20) NOT NULL default ''," .
+		     "  PRIMARY KEY  (`node_id`,`service`)" .
 		     ") ENGINE=MyISAM DEFAULT CHARSET=latin1;");
     }
     DBQueryFatal("alter table reserved change erole erole " .