ServerHandler.cpp: Remove "Qt::QueuedConnection" attribute for connection between "readyRead()" and "udpReady()"
ServerHandler.cpp: Remove "Qt::QueuedConnection" attribute for connection between "readyRead()" and "udpReady()"

It causes Mumble's UDP system to not work properly on Linux, for a currently unknown reason.

Fixes issue #3256.

Lartza/mumble,Lartza/mumble,Lartza/mumble,Lartza/mumble,Lartza/mumble,Lartza/mumble,Lartza/mumble,Lartza/mumble