rename file prefixes to ukern_
start to update ROADMAP to reflect new goals
delete old directory
fix missed getenv rename
if DDB is defined needs kdb.h
the start of text is _init in ukern
ukern doesn't have TIMER_SPKR
delete seemingly dead code
make fdused for threads that need to fake up descriptors
unbreak unconditional dependency on loop and ether
make certain operations VM ops conditional on ifndef ukern
- rename compiled library itself to libukern
- remove code shimming kernel apis on to pthreads
- import amd64 MD code as baseline to work from
- we now reach most of the way through VM initialization, but an
  at least partial pmap implementation is required
remove detritus