(legacy) rename all_help id in vpn_openvpn_server.php

src/www/vpn_openvpn_server.php

@@ -728,7 +728,7 @@ function tuntap_change() {
 											<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>