--- /etc/defaults/rc.conf.orig	2015-12-02 16:00:12.000000000 +0100
+++ /etc/defaults/rc.conf	2016-03-21 21:41:40.000000000 +0100
@@ -99,6 +99,12 @@
 			# 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 'manual' to umount the tmpfs partitions listed
+			# in swapoff_umount_fs before removing swap. Set to
+			# 'auto' to umount all tmpfs paritions that contain
+			# no device nodes.
+swapoff_umount_fs=	# space-separated list of tmpfs mount points to umount
+			# before removing swap if swapoff_umount=manual
 
 # Concatenated disk driver.
 #