netinet/tcp.h and linux/tcp.h have different lenghts but overlap. LDP
uses the former while iperf the latter. Accept both lengths for now as
we do not support exposing tcp metrics via ldp.
Type: improvement
Change-Id: I13a149d68715ed9451773630a3595c09c421aa29
Signed-off-by: Florin Coras <fcoras@cisco.com>