Yesod.Core.Handler.languages behavior change

[Pat Brisbin]

Hey folks-

I just wanted to give a heads up that the order of languages returned by the languages function will change in 1.6.19.0.

Until then, it prioritized the language set in the user's session:

- Session

- Query

- Cookie

- Accept-Language header

It will now prioritize the query parameter first:

- Query

- Session

- Cookie

- Accept-Language header

This happens to be the order of values in YesodRequest{reqLangs} already, so languages will now just be a pass-through to reading that.

For more details, see https://github.com/yesodweb/yesod/issues/1720 and https://github.com/yesodweb/yesod/pull/1721.

Thanks,

Pat