Re: Improve OAuth discovery logging

> Well, you can do something in a line with

Yes, but I either have to declare was_discovery at the beginning of
the function, or add { ... } for the case and declare it at the
beginning of the case branch. Neither of those seems to be more
readable to me. With different coding conventions I would definitely
do a `const bool was_discovery` directly before the if, but I can't do
that here.

Thanks for the comment suggestions, I attached an updated version with
an edited comment for exchange().