Fix commands complaining about common commands

Some mutators use mutate specific mutate commands "help", "version",
"status" and "credits" to ouput info about themselves.
Before this patch commands complained that there wasn't first three of
them. Now it doesn't complain.

sources/Commands/Commands_Feature.uc

@@ -486,10 +486,12 @@ private function HandleMutate(string command, PlayerController sendingPlayer)
     local Parser    parser;
     local EPlayer   sender;
 
-    //  Ignore just "help", since a lot of other mutators use it
-    if (command ~= "help") {
-        return;
-    }
+    //  A lot of other mutators use these commands
+    if (command ~= "help")      return;
+    if (command ~= "version")   return;
+    if (command ~= "status")    return;
+    if (command ~= "credits")   return;
+
     parser = _.text.ParseString(command);
     sender = _.players.FromController(sendingPlayer);
     HandleInput(parser, sender);