clarify which process writes out stats upong SIGINFO reception.

pointed out by Frank Brodbeck <fab at guug.de>, actual change with & ok jmc

src/usr.sbin/ntpd/ntpd.8

@@ -1,4 +1,4 @@
-.\" $OpenBSD: ntpd.8,v 1.32 2012/08/30 06:48:33 jmc Exp $
+.\" $OpenBSD: ntpd.8,v 1.33 2012/09/19 16:30:39 henning Exp $
 .\"
 .\" Copyright (c) 2003, 2004, 2006 Henning Brauer <henning@openbsd.org>
 .\"
@@ -14,7 +14,7 @@
 .\" AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 .\" OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: August 30 2012 $
+.Dd $Mdocdate: September 19 2012 $
 .Dt NTPD 8
 .Os
 .Sh NAME
@@ -119,6 +119,7 @@ Clock drift is periodically written to the drift file thereafter.
 .Pp
 When
 .Nm
+.Pq engine
 receives a
 .Dv SIGINFO
 signal, it writes its peer and sensor status to