* Figure out why it's failing (TDSK) on some boxes. (Might be solved.)

* Squeeze the size of bookeeping struct down with one byte.

* Is there a race while allocating a handle? Like this: a call to
	xms_alloc_xms, interrupt occurs giving control to interrupt
	routine that calls xms_alloc_xms -> bang!

* Why does it break if we allow allocation of zero sized handles when
	we're out of memory?


----------------------------
For much(?) later:

* XXMS support.
