Our proc.c alignment is perfect.  Since ksegment/usegment went away, we get a column back, so we get our two action-packed spreads.

Swap bootmain.c and bootother.S.  This puts the whole boot process on one spread, though it separates the two asm files.

We don't use lesp/lebp and using them at all from C would be fraught with peril.  Keep resp/rebp, but fix their code style.

kinit() knows about end and PHYSTOP
map all of kernel read/write (rather than r/o instructions)
thanks, austin

do not keep sorted contiguous free list

Fix for gdbstub argument change in qemu 0.11.  Rename qemu-gdb-nox target to qemu-nox-gdb because you frequently want to add the gdb part, but rarely the nox part.

increase PHYSTOP