Preparing for 2.6.0 beta

[Fred Wright]

On Sat, 24 Aug 2019, Joshua Root wrote:

> I think we're pretty close to being ready to make a new stable branch
> and tag a beta. Clemens is going to make one more change related to
> Xcode checking; are there any other changes that really need to go in
> before the beta?

Though I wouldn't call a 16-month-old ticket "urgent", it might be nice if 
someone could look at:

 	https://trac.macports.org/ticket/56437

This might become more significant with the libcxx churn.

Fred Wright