not number of threads. can still starve all the other threads,
but only by looping, not by waiting in a system call.
fix darwin syscall.Syscall6 bug.
fix chanclient bug.
delete $GOMAXPROCS from network tests.
add stripped down printf, sys.printhex to runtime.
R=r
DELTA=355 (217 added, 36 deleted, 102 changed)
OCL=20017
CL=20019
* 1. all statements and declarations are terminated by semicolons
* 2. semicolons can be omitted at top level.
* 3. semicolons can be omitted before and after the closing ) or }
* on a list of statements or declarations.
/home/rsc/bin/addsemi and then diff+tweak.
R=r,gri
OCL=16620
CL=16643
