openvpn: document how to import an external config

Changed files
+3
nixos
modules
services
networking
+3
nixos/modules/services/networking/openvpn.nix
···
Configuration of this OpenVPN instance. See
<citerefentry><refentrytitle>openvpn</refentrytitle><manvolnum>8</manvolnum></citerefentry>
for details.
'';
};
···
Configuration of this OpenVPN instance. See
<citerefentry><refentrytitle>openvpn</refentrytitle><manvolnum>8</manvolnum></citerefentry>
for details.
+
+
To import an external config file, use the following definition:
+
<literal>config = "config /path/to/config.ovpn"</literal>
'';
};