Mention how to add or remove windows in the building instructions.

git-svn-id: svn://svn.code.sf.net/p/crossfire/code/maps/trunk@9718 282e977c-c81d-0410-88c4-b93c2d0d6712

brest/shops/buildshop

@@ -831,6 +831,7 @@ Building enables you to put walls and floors where you want.
 Building a floor lets you remove walls. This is the only way to remove them.
 You can change an existing floor by building another on top. Same goes for walls.
 All created floors are magic, and will preserve items you put on them.
+You can add a window in some walls. To remove the window, build a new wall.
 endmsg
 x 5
 y 20

navar_city/misc/buildshop

@@ -404,6 +404,7 @@ Building enables you to put walls and floors where you want.
 Building a floor lets you remove walls. This is the only way to remove them.
 You can change an existing floor by building another on top. Same goes for walls.
 All created floors are magic, and will preserve items you put on them.
+You can add a window in some walls. To remove the window, build a new wall.
 endmsg
 x 5
 y 7

pup_land/lone_town/shops/buildshop

@@ -2383,6 +2383,7 @@ Building enables you to put walls and floors where you want.
 Building a floor lets you remove walls. This is the only way to remove them.
 You can change an existing floor by building another on top. Same goes for walls.
 All created floors are magic, and will preserve items you put on them.
+You can add a window in some walls. To remove the window, build a new wall.
 endmsg
 x 18
 y 20

scorn/shops/buildshop

@@ -2993,6 +2993,7 @@ Building enables you to put walls and floors where you want.
 Building a floor lets you remove walls. This is the only way to remove them.
 You can change an existing floor by building another on top. Same goes for walls.
 All created floors are magic, and will preserve items you put on them.
+You can add a window in some walls. To remove the window, build a new wall.
 endmsg
 x 18
 y 16

wolfsburg/shops/buildshop

@@ -2983,6 +2983,7 @@ Building enables you to put walls and floors where you want.
 Building a floor lets you remove walls. This is the only way to remove them.
 You can change an existing floor by building another on top. Same goes for walls.
 All created floors are magic, and will preserve items you put on them.
+You can add a window in some walls. To remove the window, build a new wall.
 endmsg
 x 16
 y 37