tcp: add node with no 6-tuple lookup
tcp: add node with no 6-tuple lookup

Type: feature

Add new node in TCP stack where TCP 6 tuple lookup is not required.
In new node, packet metadata contains connection-index which can be used
to retrieve the TCP connection. The new node will be used by proxy.

Change-Id: I3aa0268946898912f4176d5c8c5903e06657479d
Signed-off-by: Vladimir Kropylev <f8129a796e934f0518e32e432cbbfd4f723f9f09@enea.com>

chrisy/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,vpp-dev/vpp