$FreeBSD$
--- ntpd.conf.5.orig	2009-08-01 21:41:54.000000000 +0200
+++ ntpd.conf.5	2009-08-01 21:47:49.000000000 +0200
@@ -28,7 +28,7 @@ configuration file.
 The optional
 .Ic weight
 keyword permits finer control over the relative importance
-of time sources (servers or sensor devices).
+of time sources.
 Weights are specified in the range 1 to 10;
 if no weight is given,
 the default is 1.
@@ -70,51 +70,6 @@ or
 listen on 127.0.0.1
 listen on ::1
 .Ed
-.It Xo Ic sensor Ar device
-.Op Ic correction Ar microseconds
-.Op Ic weight Ar weight-value
-.Op Ic refid Ar string
-.Xc
-Specify a timedelta sensor device
-.Xr ntpd 8
-should use.
-The sensor can be specified multiple times:
-.Xr ntpd 8
-will use each given sensor that actually exists.
-Non-existent sensors are ignored.
-If
-.Sq *
-is given as device name,
-.Xr ntpd 8
-will use all timedelta sensors it finds.
-.Xr ntpd 8
-does not use any timedelta sensor by default.
-For example:
-.Bd -literal -offset indent
-sensor *
-sensor udcf0
-.Ed
-.Pp
-An optional correction in microseconds can be given to compensate
-for the sensor's offset.
-The maximum correction is 127 seconds.
-For example, if a DCF77 receiver is lagging 15ms behind
-actual time:
-.Bd -literal -offset indent
-sensor udcf0 correction 15000
-.Ed
-.Pp
-An optional reference ID string - up to 4 ASCII characters - can be
-given to publish the sensor type to clients.
-RFC 2030 suggests some common reference identifiers, but new identifiers
-"can be contrived as appropriate."
-If an ID string is not given,
-.Xr ntpd 8
-will use a generic reference ID.
-For example:
-.Bd -literal -offset indent
-sensor msts0 refid GPS
-.Ed
 .It Xo Ic server Ar address
 .Op Ic weight Ar weight-value
 .Xc
@@ -157,15 +112,14 @@ servers pool.ntp.org
 .Ed
 .El
 .Sh FILES
-.Bl -tag -width "/etc/ntpd.confXXX" -compact
-.It Pa /etc/ntpd.conf
+.Bl -tag -width "%%PREFIX%%/etc/ntpd.confXXX" -compact
+.It Pa %%PREFIX%%/etc/ntpd.conf
 default
 .Xr ntpd 8
 configuration file
 .El
 .Sh SEE ALSO
-.Xr ntpd 8 ,
-.Xr sysctl 8
+.Xr ntpd 8
 .Sh HISTORY
 The
 .Nm