diff -r 490d5cc509ed -r cf61fcea0001 wp/wp-admin/includes/import.php
--- a/wp/wp-admin/includes/import.php	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-admin/includes/import.php	Mon Oct 14 17:39:30 2019 +0200
@@ -11,6 +11,7 @@
  *
  * @since 2.0.0
  *
+ * @global array $wp_importers
  * @return array
  */
 function get_importers() {
@@ -42,10 +43,12 @@
  *
  * @since 2.0.0
  *
- * @param string $id Importer tag. Used to uniquely identify importer.
- * @param string $name Importer name and title.
- * @param string $description Importer description.
- * @param callback $callback Callback to run.
+ * @global array $wp_importers
+ *
+ * @param string   $id          Importer tag. Used to uniquely identify importer.
+ * @param string   $name        Importer name and title.
+ * @param string   $description Importer description.
+ * @param callable $callback    Callback to run.
  * @return WP_Error Returns WP_Error when $callback is WP_Error.
  */
 function register_importer( $id, $name, $description, $callback ) {
@@ -122,19 +125,29 @@
 function wp_get_popular_importers() {
 	include( ABSPATH . WPINC . '/version.php' ); // include an unmodified $wp_version
 
-	$locale = get_locale();
-	$popular_importers = get_site_transient( 'popular_importers_' . $locale );
+	$locale = get_user_locale();
+	$cache_key = 'popular_importers_' . md5( $locale . $wp_version );
+	$popular_importers = get_site_transient( $cache_key );
 
 	if ( ! $popular_importers ) {
-		$url = add_query_arg( 'locale', get_locale(), 'http://api.wordpress.org/core/importers/1.1/' );
-		$options = array( 'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url() );
+		$url = add_query_arg( array(
+			'locale'  => $locale,
+			'version' => $wp_version,
+		), 'http://api.wordpress.org/core/importers/1.1/' );
+		$options = array( 'user-agent' => 'WordPress/' . $wp_version . '; ' . home_url( '/' ) );
+
+		if ( wp_http_supports( array( 'ssl' ) ) ) {
+			$url = set_url_scheme( $url, 'https' );
+		}
+
 		$response = wp_remote_get( $url, $options );
 		$popular_importers = json_decode( wp_remote_retrieve_body( $response ), true );
 
-		if ( is_array( $popular_importers ) )
-			set_site_transient( 'popular_importers_' . $locale, $popular_importers, 2 * DAY_IN_SECONDS );
-		else
+		if ( is_array( $popular_importers ) ) {
+			set_site_transient( $cache_key, $popular_importers, 2 * DAY_IN_SECONDS );
+		} else {
 			$popular_importers = false;
+		}
 	}
 
 	if ( is_array( $popular_importers ) ) {
@@ -154,49 +167,49 @@
 		// slug => name, description, plugin slug, and register_importer() slug
 		'blogger' => array(
 			'name' => __( 'Blogger' ),
-			'description' => __( 'Install the Blogger importer to import posts, comments, and users from a Blogger blog.' ),
+			'description' => __( 'Import posts, comments, and users from a Blogger blog.' ),
 			'plugin-slug' => 'blogger-importer',
 			'importer-id' => 'blogger',
 		),
 		'wpcat2tag' => array(
 			'name' => __( 'Categories and Tags Converter' ),
-			'description' => __( 'Install the category/tag converter to convert existing categories to tags or tags to categories, selectively.' ),
+			'description' => __( 'Convert existing categories to tags or tags to categories, selectively.' ),
 			'plugin-slug' => 'wpcat2tag-importer',
 			'importer-id' => 'wp-cat2tag',
 		),
 		'livejournal' => array(
 			'name' => __( 'LiveJournal' ),
-			'description' => __( 'Install the LiveJournal importer to import posts from LiveJournal using their API.' ),
+			'description' => __( 'Import posts from LiveJournal using their API.' ),
 			'plugin-slug' => 'livejournal-importer',
 			'importer-id' => 'livejournal',
 		),
 		'movabletype' => array(
 			'name' => __( 'Movable Type and TypePad' ),
-			'description' => __( 'Install the Movable Type importer to import posts and comments from a Movable Type or TypePad blog.' ),
+			'description' => __( 'Import posts and comments from a Movable Type or TypePad blog.' ),
 			'plugin-slug' => 'movabletype-importer',
 			'importer-id' => 'mt',
 		),
 		'opml' => array(
 			'name' => __( 'Blogroll' ),
-			'description' => __( 'Install the blogroll importer to import links in OPML format.' ),
+			'description' => __( 'Import links in OPML format.' ),
 			'plugin-slug' => 'opml-importer',
 			'importer-id' => 'opml',
 		),
 		'rss' => array(
 			'name' => __( 'RSS' ),
-			'description' => __( 'Install the RSS importer to import posts from an RSS feed.' ),
+			'description' => __( 'Import posts from an RSS feed.' ),
 			'plugin-slug' => 'rss-importer',
 			'importer-id' => 'rss',
 		),
 		'tumblr' => array(
 			'name' => __( 'Tumblr' ),
-			'description' => __( 'Install the Tumblr importer to import posts & media from Tumblr using their API.' ),
+			'description' => __( 'Import posts & media from Tumblr using their API.' ),
 			'plugin-slug' => 'tumblr-importer',
 			'importer-id' => 'tumblr',
 		),
 		'wordpress' => array(
 			'name' => 'WordPress',
-			'description' => __( 'Install the WordPress importer to import posts, pages, comments, custom fields, categories, and tags from a WordPress export file.' ),
+			'description' => __( 'Import posts, pages, comments, custom fields, categories, and tags from a WordPress export file.' ),
 			'plugin-slug' => 'wordpress-importer',
 			'importer-id' => 'wordpress',
 		),