HTPS has actually three states not two so the macro needs to account for that.

Ok lets fix up the tcp_in_hpts() so that it also says yes if you
are in the race state moving and you are scheduled to be put in.
This also requires changing the MPASS to be the old version non
inline function of tcp_in_hpts().

This change also adds a new inline macro so that a uint64_t timestamp can be
obtained by a transport (aka Rack will use this).

Reviewed by: glebius, tuexen
Sponsored by: Netflix Inc.
Differential Revision: https://reviews.freebsd.org/D44157