run.bash: set appropriate ulimits     mainly for NetBSD/OpenBSD.
run.bash: set appropriate ulimits
    mainly for NetBSD/OpenBSD.

R=bradfitz, r, rsc
CC=golang-dev
http://codereview.appspot.com/6453154
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go