Do not update mtab if it is a symbolic link

Reported-by: <junkmailnotread@yahoo.com>
X-Gentoo-Bug: 370037
X-Gentoo-Bug-URL: http://bugs.gentoo.org/show_bug.cgi?id=370037

init.d/mtab.in

@@ -12,10 +12,9 @@ depend()
 
 start()
 {
-	# /etc/mtab could be a symlink to a location in /proc
-	if readlink -f /etc/mtab | grep -sq '^/proc/\(self\|[0-9]\+\)/mounts$'
+	if [ -l /etc/mtab ]
 	then
-		einfo "Skipping mtab update (link points to location in /proc)"
+		einfo "Skipping mtab update (mtab is a symbolic link)"
 		return 0
 	fi