Privacy: Add `$request` to `$email_data` to make it available to all filters.

Props desrosj.
Merges [43477] to the 4.9 branch.
Fixes #44379.
Built from https://develop.svn.wordpress.org/branches/4.9@43488


git-svn-id: http://core.svn.wordpress.org/branches/4.9@43315 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/user.php

@@ -3290,6 +3290,7 @@ function wp_send_user_request( $request_id ) {
 	}
 
 	$email_data = array(
+		'request'     => $request,
 		'email'       => $request->email,
 		'description' => wp_user_request_action_description( $request->action_name ),
 		'confirm_url' => add_query_arg( array(

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9.8-alpha-43487';
+$wp_version = '4.9.8-alpha-43488';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.