JSI Tip 1518. UNC Shortcuts do not work on busy RAS server.

If you try to use a UNC shortcut when connected to a busy RAS server, or one that has 700+ shares, the UNC shortcuts may not work.

The slow link, busy system, and share enumeration causes the default 7.5 second slow link timeout to trip.

The fix is just like tip 1077, except the starting value for NetLinkTimeout should be at least 9000 (9 seconds).