=head2 Plugin C<ntpd>
+The C<ntpd> plugin collects per-peer ntpd data such as time offset and time
+dispersion.
+
+For talking to B<ntpd>, it mimics what the B<ntpdc> control program does on
+wire - using B<mode 7> specific requests. This mode is deprecated with
+newer B<ntpd> releases (4.2.7p230 and later). For the C<ntpd> plugin to work
+correctly with them, the ntp daemon must be explicitly configured to
+enable B<mode 7> (which is disabled by default). Refer to the I<ntp.conf(5)>
+manual page for details.
+
+Available configuration options for the C<ntpd> plugin:
+
=over 4
=item B<Host> I<Hostname>