Upgrade/Install: Allow for WordPress.org to remotely disable auto-updates for plugins/themes

As auto-updates are rolled out across WordPress.org, the API response can modulate the response, ensuring that a rolled out could be stalled or staggered if needed for security or performance reasons.

This brings the changes from [48701] to the 5.5 branch.

Fixes #50824.
Props dd32, whyisjake, SergeyBiryukov.

Built from https://develop.svn.wordpress.org/branches/5.5@48702


git-svn-id: http://core.svn.wordpress.org/branches/5.5@48464 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-automatic-updater.php

@@ -170,6 +170,11 @@ class WP_Automatic_Updater {
 			$update = ! empty( $item->autoupdate );
 		}
 
+		// If the `disable_autoupdate` flag is set, override any user-choice, but allow filters.
+		if ( ! empty( $item->disable_autoupdate ) ) {
+			$update = $item->disable_autoupdate;
+		}
+
 		/**
 		 * Filters whether to automatically update core, a plugin, a theme, or a language.
 		 *

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-RC1-48698';
+$wp_version = '5.5-RC1-48702';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.