Do not mention shutdownhook_establish(9) and doshutdownhooks(9), but

mention pmf(9) and pmf_system_shutdown(9), instead.

share/man/man9/intro.9

@@ -1,4 +1,4 @@
-.\"     $NetBSD: intro.9,v 1.11 2009/05/04 19:42:14 wiz Exp $
+.\"     $NetBSD: intro.9,v 1.12 2010/02/11 18:23:32 dyoung Exp $
 .\"
 .\" Copyright (c) 1997, 2007 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -27,7 +27,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd February 17, 2007
+.Dd February 11, 2010
 .Dt INTRO 9
 .Os
 .Sh NAME
@@ -599,7 +599,7 @@ See
 .Pp
 Run all shutdown hooks.
 See
-.Xr doshutdownhooks 9 .
+.Xr pmf_system_shutdown 9 .
 .Pp
 Kernel internal error numbers.
 See
@@ -636,7 +636,7 @@ See
 .Pp
 Add or remove a shutdown hook.
 See
-.Xr shutdownhook_establish 9 .
+.Xr pmf 9 .
 .Pp
 Non-local jumps.
 See