* kernel/syscalls/systab.c: mv code from .h to here
* sys/src/make_trace.txt:
* sys/src/9/port/semaphore.p: delete
* kernel/boot/boot.h: simplify boot process, remove code for different
method support (we just use connectlocal)
kernel: annotate @Scheck, investigate false positives, remove dead code
kernel: remove more deadcode, went though all list reported by scheck