Bump the db queue limit to 30 before we warn. I only have 1 server that gets over 20 and it is still ok.

src/zm_db.cpp

@@ -251,7 +251,7 @@ void zmDbQueue::process() {
       mCondition.wait(lock);
     }
     while (!mQueue.empty()) {
-      if (mQueue.size() > 20) {
+      if (mQueue.size() > 30) {
         Logger *log = Logger::fetch();
         Logger::Level db_level = log->databaseLevel();
         log->databaseLevel(Logger::NOLOG);