Fix the code to retry mount attempt in mountcritlocal if there are

any root mount holds.  The previous one used a wrong conditional - the
"err=$?" assignment resets "$?" to 0.

Submitted by:	jilles@
MFC after:	1 month
Sponsored by:	The FreeBSD Foundation

etc/rc.d/mountcritlocal

@@ -44,7 +44,7 @@ mountcritlocal_start()
 	# and retry.
 	mount -a -t ${mount_excludes}
 	err=$?
-	if [ $? -ne 0 ]; then
+	if [ ${err} -ne 0 ]; then
 		echo
 		echo 'Mounting /etc/fstab filesystems failed,' \
 		    'will retry after root mount hold release'