This reverts commit 3a18878b.

Work around a new Windows issue where the call to list the local network interfaces takes for freaking ever to return, blocking the UDP thread altogether.

Fix bluerobotics/qgroundcontrol#164
Signed-off-by: Patrick J.P <patrickelectric@gmail.com>

Don't bother testing the reason for exiting the wait condition. If there is nothing to do, it will exit any way.

Fix typo.

Try/Finally causes window to close all the time

This reverts commit 7e6588f6.