allow options to be passed to killall5

This allows options to be passed to killall5 by the killprocs script.
This was added so that certain processes will not be killed during
shutdown.

x-Gentoo-Bug: 371625
x-Gentoo-Bug-URL: http://bugs.gentoo.org/show_bug.cgi?id=371625

init.d/killprocs.in

@@ -12,11 +12,11 @@ depend()
 start()
 {
 	ebegin "Terminating remaining processes"
-	killall5 -15
+	killall5 -15 ${killall5_opts}
 	sleep 1
 	eend 0
 	ebegin "Killing remaining processes"
-	killall5 -9
+	killall5 -9 ${killall5_opts}
 	sleep 1
 	eend 0
 }