document syscall.  all we do is redirect elsewhere.
document syscall.  all we do is redirect elsewhere.

R=rsc
DELTA=7  (7 added, 0 deleted, 0 changed)
OCL=25859
CL=25871
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go