Core/DBLayer:

- Rewrite KeepAlive method for DatabaseWorkerPool. Use mysql_ping instead of explicit select queries, and also schedule KeepAlives for asynchronous threads.
NOTE: While the function is implemented and previous keepalive calls were transformed, it´s possible the keepalive call will need to be placed in several other locations in the code. Please leave feedback on whether or not this fixes your timeout issues.

Update issue #4062

--HG--
branch : trunk

src/server/worldserver/Master.cpp

@@ -135,7 +135,7 @@ public:
         {
             loopCounter = 0;
             sLog.outDetail ("Ping MySQL to keep connection alive");
-            LoginDatabase.Query ("SELECT 1 FROM realmlist LIMIT 1");
+            LoginDatabase.KeepAlive();
         }
     }