(svn r5369) -Backport: 5363, 5364, 5365
-Fix: It was possible to dig into a tunnel if certain rail combinations were ontop of it

(svn r5368) -Backport: 5351, 5352
-Fix: Several graphical glitches at adjacent tiles with foundations. Some borders were missing, some were superfluous
-Fix: Return accurate slope information for tunnels and bridges to fix several foundation graphics glitches

(svn r5367) -Backport: 5348
-Fix: A HQ could only be flooded at its northern tile, the other 3 were immune to water

(svn r5361) - Conform more closely to SVN specs. Rename 'branch' to 'branches'

(svn r5356) Move the inclusion of slope.h to reduce diff to trunk

(svn r5350) -Backport: r5327
Use DrawFoundation() for houses
-Fix: Some graphical glitches on house tiles with foundations
-Fix: The selection cursor is now aligned with the top of the foundation for house tiles

(svn r5349) -Backport: r5315
-Fix: Prohibit altering a road tile while road works are in progress
This fixes some glitches like "turning" the excavation by adding/removing road bits or removing the road piece

(svn r5331) -Backport: r5294
-Fix: Plug a memory leak

(svn r5330) -Backport: r5292, r5293, r5295, r5297
-Fix: When using SIOCGIFCONF to detect network interfaces accomodate for the fact that struct sockaddr doesn't have fixed size in all implementations
-Fix: Not all network interfaces are capable of broadcasting. Don't record those which aren't
-Fix: Not all networks are /24. Generate proper broadcast addresses for non-/24 nets

(svn r5329) -Backport: r5291
-Fix: '-f' switch is not valid on windows, so don't show it in help