[WordPress][IndieWeb] Customise relme list of the IndieWeb plugin.

wordpress-indieweb-custom.php

<?php
/**
 * Plugin Name: IndieWeb | Customisations
 * Description: Customises relme list of the IndieWeb plugin.
 * Version:     2019.01
 * Author:      Caspar Hübinger
 * Author URI:  http://glueckpress.com/
 * License: GNU General Public License v2 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 */

defined( 'ABSPATH' ) or exit;

add_filter( 'wp_relme_silos', function( $silos ) {

	$silos[ 'mastodon' ] = [
		'baseurl' => '',
		'display' => __( 'Mastodon profile URL', 'indieweb' ),
	];
	/* LinkedIn is already set up as a contact method by the IndieWeb plugin,
	   but it’s not included in the h-card relme list, so we’re explicitly
	   include it here. */
	$silos[ 'linkedin' ] = [
		'baseurl' => '',
		'display' => __( 'LinkedIn profile URL', 'indieweb' ),
	];
	$silos[ 'wordpress'] = [
		'baseurl' => 'https://profiles.wordpress.org/%s/',
		'display' => __( 'WordPress.org username', 'indieweb' ),
	];

	return $silos;
} );