Add zfs volinit command, suggested by tnn@ this will initialize all zvols

defined in a system. So they can be mounted from fstab as regular block
devices.

etc/rc.d/mountall

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# $NetBSD: mountall,v 1.7 2009/10/05 22:39:27 haad Exp $
+# $NetBSD: mountall,v 1.8 2009/10/18 21:58:37 haad Exp $
 #
 
 # REQUIRE: mountcritremote named ypbind
@@ -18,6 +18,8 @@ mountall_start()
 	if [ -f /etc/zfs/zpool.cache ]; then
 		# Get ZFS module loaded (and thereby, zvols created).
 		zfs list > /dev/null 2>&1
+		# Initialize zvols so they can be mounted 
+		zfs volinit
 		# Mount file systems noted in fstab.
 		mount -a
 		# Mount ZFS file systems.