busybox: Enhanced to handle busybox/$module/ as an overlay directory automaticly

pkg_conf/busybox.conf

@@ -13,16 +13,30 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
-# don't forget to unset this later
 BB_MNEMOSYNE_DIR="$base/target/$SDECFG_TRG_MNEMOSYNE/busybox"
 
+bb_mnemosyne_overlay=
+bb_mnemosyne_overlay_apply()
+{
+	local x=
+	for x in $bb_mnemosyne_overlay; do
+		overlay_apply "$x"
+	done
+}
+hook_add postdoc 5 'bb_mnemosyne_overlay_apply'
+
 bb_mnemosyne_append()
 {
 	local x=
+	local y=
 	for x; do
-		if [ -s "$BB_MNEMOSYNE_DIR/$x.config" ]; then
-			var_append conffiles ' ' $BB_MNEMOSYNE_DIR/$x.config
-		fi
+		# busybox config settings
+		y="$BB_MNEMOSYNE_DIR/$x.config"
+		[ ! -s "$y" ] || var_append conffiles ' ' "$y"
+
+		# overlay directories
+		y="$BB_MNEMOSYNE_DIR/$x"
+		[ ! -d "$y/" ] || var_append bb_mnemosyne_overlay ' ' "$y"
 	done
 }