Should ignore packets sent between two other nodes

[tht]

The driver reports back all received packets, even if they are addressed to another node.
=> Should only report packets sent to broadcast or own node id

Note: allows to abort reception as soon as header arrived.

[tht]

As with 75a5642 packets sent directly to another node are no longer reported. It still reports broadcasts.

There are two open points here:

• Make configurable (sniffer/collector mode)
• We could throw away these packets earlier, just after receiving the header

=> Marked as "enhancement" now as bug is actually closed.