More lenient testMakeRequestWithError

This test was for ``` ERROR -> 6: Could not resolve host: 404.php.net; nodename nor servname provided, or not known ```, and it was failing on my machine because my message was ``` ERROR -> 6: Couldn't resolve host '404.php.net' ```.

Obviously, those should both pass, so I modified the test to do a regex match that catches both of those.

(My guess is that these error messages are OS-dependent, so this test may need tweaking later.)