Synopsis: mount_union with a '/' suffix to directory causes problems

State-Changed-From-To: open->closed
State-Changed-By: erh@netbsd.org
State-Changed-When: Mon, 31 Jan 2005 05:21:00 +0000
State-Changed-Why:
Both fixes applied.  There is now a -R option to unmount,
and all the mount_* programs, including mount_union, use realpath
to sanitize the directory paths.