[MacPorts] #58567: qca: update to 2.2.1 for botan2 compatibility

[René J.V. Bertin]

MacPorts wrote on 20190606::15:33:53 re: "[MacPorts] #58567: qca: update to 2.2.1 for botan2 compatibility"

> available since qca 2.2.0. As botan2 is needed for OpenSSL 1.1 (2), could
> you update qca?
...
> I'm fine with either approach.

> Ticket URL: <https://trac.macports.org/ticket/58567>

Hmmm, I did not realise I was the only remaining maintainer of port:qca (in my mind I maintained qca-qt5 only).

Is there anyone who wouldn't mind becoming co-maintainer (or taking over) and who has commit access? I'm not very interested in the prospect of having to apply possibly multiple and urgent fixes to this port that I cannot commit myself...

That said, can't the 2 botan versions coexist?

R.