Default for LB_UNION_FILESYSTEM is now "overlay" just like in live-boot.

debian/changelog

@@ -40,6 +40,7 @@ live-build (1:20161128) UNRELEASED; urgency=medium
   * Bump Standards-Version to 3.9.8.
   * Use a grub theme that integrates reasonably well with the current
     background picture.
+  * Default for LB_UNION_FILESYSTEM is now "overlay" just like in live-boot.
 
   [ Kristian Klausen ]
   * Include ext{3,4} journal size when calculating image size. Closes: #801712

functions/defaults.sh

@@ -396,7 +396,7 @@ Set_defaults ()
 	LB_CHROOT_FILESYSTEM="${LB_CHROOT_FILESYSTEM:-squashfs}"
 
 	# Setting union filesystem
-	LB_UNION_FILESYSTEM="${LB_UNION_FILESYSTEM:-aufs}"
+	LB_UNION_FILESYSTEM="${LB_UNION_FILESYSTEM:-overlay}"
 
 	# Setting interactive shell/X11/Xnest
 	LB_INTERACTIVE="${LB_INTERACTIVE:-false}"

scripts/build/binary_grub-legacy

@@ -164,7 +164,7 @@ Check_multiarchitectures
 mkdir -p "${DESTDIR_LIVE}"
 
 # Setting boot parameters
-if [ "${LB_UNION_FILESYSTEM}" != "aufs" ]
+if [ "${LB_UNION_FILESYSTEM}" != "overlay" ]
 then
 	LB_BOOTAPPEND_LIVE="${LB_BOOTAPPEND_LIVE} union=${LB_UNION_FILESYSTEM}"
 fi

scripts/build/binary_loopback_cfg

@@ -186,7 +186,7 @@ Check_multiarchitectures
 mkdir -p "${DESTDIR_LIVE}"
 
 # Setting boot parameters
-if [ "${LB_UNION_FILESYSTEM}" != "aufs" ]
+if [ "${LB_UNION_FILESYSTEM}" != "overlay" ]
 then
 	LB_BOOTAPPEND_LIVE="${LB_BOOTAPPEND_LIVE} union=${LB_UNION_FILESYSTEM}"
 fi