session: trace all packets sourced by session layer

session: trace all packets sourced by session layer

Trace both packets generated by dispatching sessions and those that have
been enqueued by other nodes, e.g., syns, fins, acks enqueued by tcp
input and output.

Because not all buffer sources know the session, remove for now the
session index from the trace. Nonetheless, next node on path will print
it, so no information is lost.

Type: improvement

Change-Id: Id69094fbf00e6bc8f98095e90cdf20e2b7f0aeda
Signed-off-by: Florin Coras <[email protected]>