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	Index: head/sys/boot/forth/loader.conf.5
	===================================================================
	--- head/sys/boot/forth/loader.conf.5
	+++ head/sys/boot/forth/loader.conf.5
	@@ -112,6 +112,31 @@
	that contains a kernel.
	.It Ar kernel_options
	Flags to be passed to the kernel.
	+.It Ar vfs.root.mountfrom
	+Specify the root partition to mount.
	+For example:
	+.Pp
	+.Dl vfs.root.mountfrom="ufs:/dev/da0s1a"
	+.Pp
	+.Xr loader 8
	+automatically calculates the value of this tunable from
	+.Pa /etc/fstab
	+from the partition the kernel was loaded from.
	+The calculated value might be calculated incorrectly when
	+.Pa /etc/fstab
	+is not available during
	+.Xr loader 8
	+startup (as during diskless booting from NFS), or if a different
	+device is desired by the user.
	+The preferred value can be set in
	+.Pa /loader.conf .
	+.Pp
	+The value can also be overridden from the
	+.Xr loader 8
	+command line.
	+This is useful for system recovery when
	+.Pa /etc/fstab
	+is damaged, lost, or read from the wrong partition.
	.It Ar password
	Protect boot menu with a password without interrupting
	.Ic autoboot