Customize: Deprecate page_home nav menu item starter content in favor of home_link; replace usage in Twenty Seventeen.

Props celloexpressions, westonruter.
Amends [38991].
See #38615, #38114.
Fixes #39104.


git-svn-id: https://develop.svn.wordpress.org/trunk@39561 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/theme.php

@@ -1965,7 +1965,12 @@ function get_theme_starter_content() {
 			) ),
 		),
 		'nav_menus' => array(
-			'page_home' => array(
+			'link_home' => array(
+				'type' => 'custom',
+				'title' => _x( 'Home', 'Theme starter content' ),
+				'url' => home_url(),
+			),
+			'page_home' => array( // Deprecated in favor of home_link.
 				'type' => 'post_type',
 				'object' => 'page',
 				'object_id' => '{{home}}',