stage1 and stage2 need to be specificed otherwise they must exist on /usr/mdec in flash (and they won't)
wrong place, we really don't know WTF is going on with the location of a vnd relative to 4K disk sectors right?
set offset for growimg/mkboot to 64 by default like real openbsd does,
for potential sector alignment help
change mfs everywhere to tmpfs now that the superior fs is an option
this also changes mfs/tardir sizes from 512-byte blocks to 1-byte blocks
(or mbyte-sized allocations as used here, 16M, 64M, etc)
vndsize will be in megabytes now, too, just like the tmpfs sizes
no more 512-byte blocks in rc.flashrd.sub!
put a random seed in /etc/random.seed on the flash during initial flashrd
cut and on each boot