Option for logging http return status when it's not 200

Problem/Motivation

The getRedirectByUrl() quietly ignores status codes that indicate an issue; specifically, the 404 status.
If we log these using the Tracking service, we'll can run a query against the logs to be able to get a list of all the 404s post-tidy

Steps to reproduce

Create (or edit) a page and add a link that points to a non-existent page to a supported field.
Run tidy for the page.

Proposed resolution

In getRedirectByUrl() add logging before returning FALSE (for a status that's not 200)

Test

Create a page with <a href="/a/path/that/results/in/404">404</a>

Run link magician on the parent page: drush link_magician:tidy nodeid --nodeid=NNNN
See the "Skipped" results (/admin/link_magician/tracking/results/skipped/{batchid}). You should see the message with the description "HTTP request unsuccessful (404)" for this link.