Tests: Use better domain for HTTP API invalid hostname test.

The previous domain that was used to test for a host whose IPv4 address cannot be resolved, `exampleeeee.com`, got registered and has an A-record now, so it's not invalid anymore.

`.invalid` is intended for use in online construction of domain names that are sure to be invalid and which it is obvious at a glance are invalid.

Reference: [https://datatracker.ietf.org/doc/html/rfc2606#section-2 Reserved Top Level DNS Names: TLDs for Testing, & Documentation Examples].

Follow-up to [52084], [58384], [58388].

Reviewed by peterwilsoncc.
Merges [59293] to the 6.6 branch.

Props sippis, johnbillion, MattyRob, swissspidy, SergeyBiryukov.
Fixes #62303.




git-svn-id: https://develop.svn.wordpress.org/branches/6.6@59298 602fd350-edb4-49c9-b593-d223f7449a82

Author: peterwilsoncc

src/wp-includes/http.php

@@ -542,7 +542,7 @@ function send_origin_headers() {
  * - ftp://example.com/caniload.php - Invalid protocol - only http and https are allowed.
  * - http:///example.com/caniload.php - Malformed URL.
  * - http://user:[email protected]/caniload.php - Login information.
- * - http://exampleeeee.com/caniload.php - Invalid hostname, as the IP cannot be looked up in DNS.
+ * - http://example.invalid/caniload.php - Invalid hostname, as the IP cannot be looked up in DNS.
  *
  * Examples of URLs that are considered unsafe by default:
  *

tests/phpunit/tests/http/http.php

@@ -549,7 +549,7 @@ public function data_wp_http_validate_url_should_not_validate() {
 				'url' => 'http://[exam]ple.com/caniload.php',
 			),
 			'a host whose IPv4 address cannot be resolved' => array(
-				'url' => 'http://exampleeeee.com/caniload.php',
+				'url' => 'http://example.invalid/caniload.php',
 			),
 			'an external request when not allowed'         => array(
 				'url'           => 'http://192.168.0.1/caniload.php',