Document redirectToCanonical

[glen-84]

I'm not sure what this does. :-)

[juriansluiman]

The point here is that "de-DE" is a locale and "de" might be an alias for "de-DE". Usually, you get to example.com/de and example.com/en. You might, however, want to use the canonical locale (which is "de-DE") so you get redirected to example.com/de-DE.

There are still quite some issues with the uri path strategy and using canonical, but the idea is as above described.