openid_provider 6.x-1.0-beta4

This is a bugfix release before I cleanup the mess the branching has become here (see ]#1418232: merge master branch into 6.x-1.x).

It features the following commits:

* b3276ea - first pass at unit tests for this module (7 months ago)
* 2b7d8cc - #1158356: can't login to ikiwiki.info (perl's Net-OpenID-Consumer?) fix authentication against Net::OpenID::Consumer perl library (7 months ago)
* cce2995 - #1197574: Notices for unused dh_modulus, dh_gen and dh_consumer_public by Gábor Hojtsy - remove warning-triggering unused variables (7 months ago)
* ff58786 - use proper 1.0 redirect in authentication errors too (8 months ago)
* c024d0c - fix debug message to correctly state we redirect using 1.0 (8 months ago)
* de38d5a - format dumps in

 (8 months ago)