(svn r24075) [1.2] -Backport from trunk:

- Fix: Reversing trains while they were entering or leaving a depot could lead to stuck trains [FS#5093] (r24071)
- Fix: The 'last joined' server was not properly selected anymore [FS#5098] (r24070)
- Fix: Immediately start querying the last joined server instead of waiting for the requery loop [FS#5097] (r24069, r24062)
- Fix: Make the full snowedness level of houses the same as roads and rails [FS#5121] (r24064)

src/pbs.cpp

@@ -369,7 +369,8 @@ Train *GetTrainForReservation(TileIndex tile, Track track)
  */
 bool IsSafeWaitingPosition(const Train *v, TileIndex tile, Trackdir trackdir, bool include_line_end, bool forbid_90deg)
 {
-	if (IsRailDepotTile(tile)) return true;
+	/* A depot is safe if we enter it, but not when we exit. */
+	if (IsRailDepotTile(tile) && TrackdirToExitdir(trackdir) != GetRailDepotDirection(tile)) return true;
 
 	if (IsTileType(tile, MP_RAILWAY)) {
 		/* For non-pbs signals, stop on the signal tile. */