Convert remaining timeouts to double format.
Add a session workspace for the TCP addresses etc.
Allocate client IP/port string from sess->ws
Reduce the reporting in SLT_SessClose to be boolean bits.

This saves approx 50 bytes of storage for the session structure
and puts us comfortably below 256 bytes, at least i the IPv4 case.
Up the sess workspace to 384, 256 isn't enough for IPv6 (yet?)
Only show the accept_filter parameter if the kernel can have
accept-filters
Shave 8 bytes of struct ws on 64 bit archs.

With 8 byte pointers, having a char[X] for X <= 8 is cheaper than
than a char *.

Don't waste 32bits on the overflow flag.
Pack struct sess better.
Sequeze struct sess storage harder.  When we add the extra
{local|remote}.ip for PROXY support, we do not want to waste 16 bytes
extra on pointers, so put all the {client|server|local|remote}.ip into
a single array -- which is unfortunately complicated by the opaqueness
of struct vsa.