* handles multiple packages per directory
* scans directory for files if given no arguments
* infers package name
* includes test rule invoking gotest
R=r
DELTA=746 (444 added, 150 deleted, 152 changed)
OCL=19504
CL=19521
enforce rule: all kernel data structures and constants
go in syscall module.
move things that should be in syscall out of net.
make net a single package.
R=r
OCL=15985
CL=15994
use -j4 (4-way parallel) in make.bash.
halves time for make.bash on r45
also add libregexp, acid to default build
R=r
DELTA=90 (39 added, 37 deleted, 14 changed)
OCL=15485
CL=15487
