Override Full Base URL

If Registry is deployed behind a web proxy (and potentially under other circumstances) it may be necessary to specify the base URL rather than allow Cake/PHP/Apache to introspect it. Cake supports this via App.fullBaseUrl, but Registry does not offer a way to override this except by patching core.php.

Options include dropping a new file into local (the existing pattern), and/or supporting override via env variables, eg

Configure::write('App.fullBaseUrl', env('FULL_BASE_URL'));