[9fans] wait hang

[erik quanstrom <quanstro@coraid.com>]

the kernel fix does indeed keep
	; for(i in `{seq 1 $n}){>/dev/null echo fu&}
	; for(i in `{seq 1 $n}){>/dev/null echo fu&}
from hanging.

however, i think the fix to rc might be in error.  if i do this

	#!/bin/rc
	cmd1&
	cmd2&
	wait

shouldn't that wait for both processes?  for example, on an older
rc, from this script

	#/bin/rc
	date
	sleep 15 &
	sleep 30 &
	wait
	date

i get

	Mon Dec 18 10:57:43 EST 2006
	Mon Dec 18 10:58:13 EST 2006

whereas with the rc from friday, i get

	; 8.out
	broken! date ; sleep 15 & sleep 30 & wait ; date
	Mon Dec 18 11:00:33 EST 2006
	Mon Dec 18 11:00:33 EST 2006

- erik