session: rules tables

This introduces 5-tuple lookup tables that may be used to implement
custom session layer actions at connection establishment time (session
layer perspective).

The rules table build mask-match-action lookup trees that for a given
5-tuple key return the action for the first longest match. If rules
overlap, ordering is established by tuple longest match with the
following descending priority: remote ip, local ip, remote port, local
port.

At this time, the only match action supported is to forward packets to
the application identified by the action.

Change-Id: Icbade6fac720fa3979820d50cd7d6137f8b635c3
Signed-off-by: Florin Coras <fcoras@cisco.com>

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