This set of changes represents many fixes and changes to the Rack stack. We also
have prepped some of the needed hooks for the up and incoming hardware TLS.
There are also some fixes to the HPTS system that will come in after this update that
should take out a couple of the function blocks (notably the hpts ones). We also have
pending some LRO changes that then allow a TCP stack to alternately see a queue
of mbufs so that it can get access to all the hardware timestamps. All of these
are prepped for in this flavor of rack. Still to come also is the dup-ack counting
and true pacing.