(legacy) rename all_help id in vpn_openvpn_client.php

src/www/vpn_openvpn_client.php

@@ -478,7 +478,7 @@ endif; ?>
 									<td width="22%"><?=gettext("General information"); ?></td>
 									<td width="78%" align="right">
 										<small><?=gettext("full help"); ?> </small>
-										<i class="fa fa-toggle-off text-danger" style="cursor: pointer;" id="show_all_help_opnvpn_server" type="button"></i></a>
+										<i class="fa fa-toggle-off text-danger" style="cursor: pointer;" id="show_all_help_page" type="button"></i></a>
 									</td>
 								</tr>
 								<tr>