Revised gateway demo to use the new device_init(NULL) way.
Eliminated triplicate I-Am responses and deprecated the offending routed_ I-Am and I-Have senders (don't see any other usages; scheduled for deletion in 2/2012).
Fixed I-Am sender to not always zero out dest->net, because if a src->net was given in Who-Is, need to have it or else global bcast in the I-Am response.
Tested and improved the routing code.
Gateway demo now sends I-Am as each Device is added.
Added test for valid Network number when routing, and only send Reject message if this fails (and not if we just can't find a Device match).
Test the hop_count and discard the packet if would reach 0 and a destination Network is called for.
For the important Device_Object_Instance_Number(), will redirect to the Routed_Device_Object_Instance_Number() function if this is a routing build.
This leaves only the Who-Is and Who-Has handlers to be dealt with.