- Misc HouseFoundation cleanup and optimization.

- Allowing the sectioning of stair components can now be turned on or off using AllowStairSectioning.
- Added missing SA stair IDs.

Athena's patch:
- Updated the component tables.
- Updated FeatureFlags.
- Added support for the Gothic and Rustic theme house tiles.

Server/ExpansionInfo.cs

@@ -70,8 +70,10 @@ namespace Server
 		Unk5			= 0x00002000,
 		Unk6			= 0x00004000,
 		Unk7			= 0x00008000,
-		SA			= 0x00010000,
-
+		SA				= 0x00010000,
+		HS				= 0x00020000,
+		Gothic			= 0x00040000,
+		Rustic			= 0x00080000,
 
 		ExpansionNone		= None,
 		ExpansionT2A		= T2A,
@@ -81,7 +83,7 @@ namespace Server
 		ExpansionAOS		= ExpansionLBR	| AOS	| Unk7,
 		ExpansionSE		= ExpansionAOS	| SE,
 		ExpansionML		= ExpansionSE	| ML	| Unk2,
-		ExpansionSA		= ExpansionML	| SA
+		ExpansionSA		= ExpansionML	| SA	| Gothic	| Rustic
 	}
 
 	[Flags]
@@ -127,7 +129,7 @@ namespace Server
 				new ExpansionInfo( 5, "Age of Shadows",		ClientFlags.Malas,		FeatureFlags.ExpansionAOS,	CharacterListFlags.ExpansionAOS,	0x0000 ),
 				new ExpansionInfo( 6, "Samurai Empire",		ClientFlags.Tokuno,		FeatureFlags.ExpansionSE,	CharacterListFlags.ExpansionSE,		0x00C0 ), // 0x20 | 0x80
 				new ExpansionInfo( 7, "Mondain's Legacy",	new ClientVersion( "5.0.0a" ),	FeatureFlags.ExpansionML,	CharacterListFlags.ExpansionML,		0x02C0 ), // 0x20 | 0x80 | 0x200
-				new ExpansionInfo( 8, "Stygian Abyss",		ClientFlags.TerMur,		FeatureFlags.ExpansionSA,	CharacterListFlags.ExpansionSA,		0x102C0 ) // 0x20 | 0x80 | 0x200 | 0x10000
+				new ExpansionInfo( 8, "Stygian Abyss",		ClientFlags.TerMur,		FeatureFlags.ExpansionSA,	CharacterListFlags.ExpansionSA,		0xD02C0 ) // 0x20 | 0x80 | 0x200 | 0x10000 | 0x40000 | 0x80000
 			};
 
 		private string m_Name;