Linedef config changes:

- Add action 6: "Sector Set Portal"
- Fix flags for wind/current (action 541) not showing up

Build/Configurations/Includes/SRB222_linedefs.cfg

@@ -9,6 +9,45 @@ udmf
 			title = "None";
 			prefix = "(0)";
 		}
+		
+		6
+		{
+			title = "Sector Set Portal";
+			prefix = "(6)";
+			arg0
+			{
+				title = "Target sector tag";
+				type = 13;
+			}
+			arg1
+			{
+				title = "Portal type";
+				type = 11;
+				enum
+				{
+					0 = "Link to portal with same tag";
+					1 = "Copy portal from second tag";
+					2 = "Skybox portal";
+					3 = "Plane portal";
+					4 = "Horizon portal";
+					5 = "Copy portal to line";
+					6 = "Interactive portal (unimplemented)";
+					7 = "Link to sector with second tag";
+					8 = "Link to object with second tag";
+				}
+			}
+			arg2
+			{
+				title = "Affected planes";
+				type = 11;
+				enum = "floorceiling";
+			}
+			arg3
+			{
+				title = "Misc";
+				tooltip = "For type 0 portal: specifies whether the line belongs to the sector viewed\nthrough the portal (1) or the sector in which the portal is seen (0).\nFor type 1 portal: specifies the sector tag of the portal to copy.\nFor type 7 portal: specifies the sector tag to make a portal to.\nFor type 8 portal: specifies the object tag to make a portal to.";
+			}
+		}
 
 		7
 		{
@@ -3745,7 +3784,7 @@ udmf
 			{
 				title = "Flags";
 				type = 12;
-				flags
+				enum
 				{
 					1 = "Slide";
 					2 = "Non-exclusive";