git: 9front

ref: e8f5e0909f4a7c7ae2c4e85f563e6b4da88aa98f
dir: /sys/src/cmd/upas/common/

appendfiletombox.c
aux.c
become.c
common.h
config.c
libsys.c
mail.c
makefile
mkfile
process.c
sys.h