Revert "Catch exception on server start"

This reverts commit f0e108a.

Author: martin-doyle

lib/server.js

@@ -216,12 +216,6 @@ function Server(opts, callback) {
         var server = interfaces.serverFactory(iface, fallback, that);
         that.servers.push(server);
         server.maxConnections = iface.maxConnections || 10000000;
-        
-        // Catch listen errors
-        server.on('error', function (e) {
-          that.logger.error('Error starting Mosca Server');
-          that.emit('error', e);
-        });        
         server.listen(port, host, dn);
       }, done);
     },