Added URL to error blocked requests

[wiuempe]

Hello, i have set in wp-config.php:

define( 'WP_HTTP_BLOCK_EXTERNAL', true );
define( 'WP_ACCESSIBLE_HOSTS', 'api.wordpress.org,downloads.wordpress.org' );

When i installed plugin which need make request, i have error: "User has blocked requests through HTTP.". If i want to add this host to whitelist, i dont know which host i should add, so i change error communicate to print URL.

[pento]

Thank you for this ticket, @wiuempe!

Could you please update the patch to user sprintf() to insert the URL in the string?