In particular, make it work with d430s as inner nodes by supporting
an "sio2" pxeboot, the 64-bit MFS, and a more modern kernel in the MFS.

we already use on the mothership. Enable for the APT cluster.

Geni style events to the portal pubsubd (on the SSL port).

a dependency on a shared /proj, shame shame shame.

clusters.

config variable that defaults to 12, but is overridden to 24
on Apt, Cloud, and the MS.

No more hardwiring in bsdefs.h (which has been moved out
of the clientside dir since it is only used in tmcd.c).

This variable is actually only used to select the version of pxeboot
at Emulab installation time. Current MFSes inherit their idea of the
console from pxeboot.

Quick, take my keyboard away before I hurt someone!

Maybe this should be the default value, but it really depends on
how you configure AMD.

to being a rack, it was just to do the initial install.