Add a hint that the settings are OR based

Signed-off-by: Joas Schilling <coding@schilljs.com>

apps/settings/js/admin.js

 	$('#shareapi_allow_share_dialog_user_enumeration').on('change', function() {
 		$('#shareapi_restrict_user_enumeration_to_group_setting').toggleClass('hidden', !this.checked);
 		$('#shareapi_restrict_user_enumeration_to_phone_setting').toggleClass('hidden', !this.checked);
+		$('#shareapi_restrict_user_enumeration_combinewarning_setting').toggleClass('hidden', !this.checked);
 	})
 
 	$('#allowLinks').change(function() {

apps/settings/templates/settings/admin/sharing.php

 } ?> />
 		<label for="shareapi_restrict_user_enumeration_to_phone"><?php p($l->t('Allow username autocompletion to users based on phonebook matches'));?></label><br />
 	</p>
+	<p id="shareapi_restrict_user_enumeration_combinewarning_setting" class="indent <?php if ($_['shareAPIEnabled'] === 'no' || $_['allowShareDialogUserEnumeration'] === 'no') {
+	p('hidden');
+}?>">
+		<em><?php p($l->t('If autocompletion "same group" and "phonebook matches" are enabled a match in either is enough to show the user.'));?></em><br />
+	</p>
 
 	<p>
 		<input type="checkbox" id="publicShareDisclaimer" class="checkbox noJSAutoUpdate"