bpo-46023: Fix makesetup handling of disabled rule (GH-30001)

Author: tiran

Misc/NEWS.d/next/Build/2021-12-09-10-25-11.bpo-46023.PLpNB6.rst

@@ -0,0 +1,2 @@
+:program:`makesetup` no longer builds extensions that have been marked as
+*disabled*. This allows users to disable modules in ``Modules/Setup.local``.

Modules/makesetup

@@ -206,6 +206,9 @@ sed -e 's/[ 	]*#.*//' -e '/^[ 	]*$/d' |
 			cpps="\$(MODULE_${mods_upper}_CFLAGS)"
 			libs="\$(MODULE_${mods_upper}_LDFLAGS)"
 		fi
+		case $DISABLED in
+		*$mods*) doconfig=disabled;;
+		esac
 		case $doconfig in
 		yes)
 			LIBS="$LIBS $libs"