--- /etc/defaults/rc.conf.orig	2015-12-02 16:00:12.000000000 +0100
+++ /etc/defaults/rc.conf	2016-03-18 22:35:17.000000000 +0100
@@ -99,6 +99,9 @@
 			# partitions and don't want to be warned about it.
 swapoff=YES		# Remove block-type swap partitions upon shutdown
 			# This defaults to yes, so that raids shutdown cleanly
+swapoff_umount=auto	# Set to a list of tmpfs filesystems to be unmounted
+			# before removing swap partitions, or 'auto' to remove
+			# all those that contain no device nodes.
 
 # Concatenated disk driver.
 #