this specifies the configuration file section containing a list of
extensions to add to the certificate request. It can be overridden
-by the B<-reqexts> command line switch.
+by the B<-reqexts> command line switch. See the
+L<x509v3_config(5)|x509v3_config(5)> manual page for details of the
+extension section format.
=item B<x509_extensions>
=head1 SEE ALSO
L<x509(1)|x509(1)>, L<ca(1)|ca(1)>, L<genrsa(1)|genrsa(1)>,
-L<gendsa(1)|gendsa(1)>, L<config(5)|config(5)>
+L<gendsa(1)|gendsa(1)>, L<config(5)|config(5)>,
+L<x509v3_config(5)|x509v3_config(5)>
=cut