DB_host object handling

	host_add		Initialise timestamp
				add to database

	host_update		change timestamp
				write to database

	host_delete		For each interface, 
				  set the host rowid to zero
				  invoke interface_update

FIXME:  Destroy the interface objects instead of orphaning them.

				For each DB_graph entry describing a 
				GXSNMP_HOST:
					graph_delete the entry
					graph_destroy the entry

FIXME:  Destroy all wires connected to the host ... both the gxsnmp_wire
	objects and the DB_graph/wire objects.

				delete from database

===============================================================================

DB_network object handling

	network_add		Initialize timestamp
				add to database

	network_update		change timestamp
				write to database

	network_delete		For each DB_graph entry describing 
				a GXSNMP_NETWORK:
					graph_delete the entry
					graph_destroy the entry

FIXME:  Destroy all wires connected to the network ... both the gxsnmp_wire
	objects and the DB_graph/wire objects.

===============================================================================


DB_interface object handling

	interface_add		Add interface to owning hosts' 
				DB_interface list.
				Add interface to selected SNMP's 
				DB_interface list.
				Initialize timestamp
				add to database

	interface_update	If interface was previously owned by a host,
				and the host has changed, then remove the
				interface from the old hosts' GList and
				zero the DB_host field.

FIXME:  Send a signal to the host saying that it has had an interface removed.

				If the interface is assigned to a new host, 
				and the DB_host field is zero, then add the
				interface to the new host's GList.
				
FIXME:  Send a signal to the host saying that it has had an interface added.
	
				If the SNMP was previously assigned, and the
				SNMP definition has changed, then remove
				interface from the old snmp's GList and
				zero the DB_snmp field.

FIXME:  Signal the DB_snmp that it has had an interface removed.

				If the interface is assigned a new SNMP 
				setting, and the DB_snmp field is zero, then
				add the interface to the new SNMP GList.

FIXME:  Signal the DB_snmp object that it has had an interface added.

				change timestamp
				write to database

	interface_delete	If the interface is assigned to a host, 
				remove the interface from the host's GList.

FIXME:  Signal the DB_host that it has had an interface removed.

				If the interface is assigned a SNMP setting,
				remove the interface from the SNMP GList

FIXME:  Signal the DB_snmp object that it has had an interface removed.		

				Delete from database	

===============================================================================

DB_graph object handling

	graph_add		Add the graph to the DB_host's GList if
				the graph is a HOST or WIRE object

FIXME:  Signal the DB_host object instead and let the object do it.

				Add the graph to the DB_network's GList if 
				the graph is a NETWORK or WIRE object

FIXME:  Signal the DB_network object instead and let the object do it.

				Initialize the timestamp
				Add the record to the graph database

	graph_update		If the graph entry was previously assigned
				to an old map, remove the graph from the
				old map's GList

FIXME:	Signal the old map instead.

				If the graph entry is assigned to a new map,
				add the graph entry to the new map.

FIXME:	Signal the new map instead.

				If the graph entry was previously assigned
				to a different host, remove the graph from
				the old host's GList

FIXME:	Signal to old host instead

				If the graph entry is assigned to a new
				host, add the graph entry to the new host.

FIXME:  Signal new host instead

				if the graph entry was previously assigned
				to a different network, remove the graph
				from the old network's GList.

FIXME:	Signal to old network instead

				If the graph entry is assigned to a new
				network, add the graph entry to the new
				network

FIXME:  Signal to net network instead.

				update timestamp
				write to database

	graph_delete		If the graph is assigned to a map, 
				remove it from the map.

FIXME:  Signal the map instead.

				If the graph is assigned to a host, 
				remove it from the host

FIXME:	Signal the host instead

				If the graph is assigned to a network,
				remove it from the network.

FIXME:	Signal the network instead.

				Delete the row from the database

===============================================================================


Methods for GXsnmp_map_items:




gxsnmp_map_item
gxsnmp_host
gxsnmp_network
gxsnmp_wire

DB_snmp -- not considered yet
DB_map  -- not considered yet

gxsnmp_window  -- not considered yet
gxsnmp_map     -- not considered yet