tcps_sndacks
tcpstat_inc(tcps_sndacks);
tcpstat_inc(tcps_sndacks);
tcpstat_inc(tcps_sndacks);
ASSIGN(tcps_sndacks);
u_int32_t tcps_sndacks; /* ack-only packets sent */
p2a(tcps_sndacks, tcps_delack,