Worked on D8 patch to unify url() and the new router generator
This patch involves removing hook_url_outbound_alter() and replacing it with a series of outbound path processors. It is the final step towards the goal of unifying the url generator from the routing system with the url() function for generating urls from paths. As the latter is one of the most widely used functions in Drupal, changing how it works is not without many consequences. The work today focused on fixing outstanding test failures - the number of failures is now at 5.