How to use ng_atmllc(4).

[Norikatsu Shigemura]

	I am sometime using the environment IEEE802.1a SNAP on ethernet.
	But FreeBSD's network stack supports only EtherframeII as IP.  So
	I researched how to use on IEEE802.1a SNAP.  I think that following
	approch is good.  But I couldn't do it:-(.

	# ngctl mkpeer . eiface if_ngeth ether
	# ngctl mkpeer . atmllc . ether   (Does not create a node)
	# ngctl list
	There are 5 total nodes:
	  Name: ngctl61978      Type: socket          ID: 000000be   Num hooks: 0
	  Name: ngeth0          Type: ether           ID: 000000ae   Num hooks: 0
	  Name: <unnamed>       Type: eiface          ID: 000000ad   Num hooks: 0
	  Name: iwi0            Type: ether           ID: 00000002   Num hooks: 0
	  Name: rl0             Type: ether           ID: 00000001   Num hooks: 0

	     |
	+----+----+
	| ngeth0  |
	+----+----+
	     | EtherframeII
	+----+----+
	|ng_atmllc|
	+----+----+
	     | IEEE802.1a SNAP
	+----+----+
	|   rl0   |
	+----+----+
	     |

	Sorry, I cannot draw above network graph like 'ngctl dot' stlye.
	So I don't know that above graph is whether OK or NG.