The [clarin-sp-aaggregator](https://github.com/ufal/clarin-sp-aaggregator)
hasn't been working for some time.  Digging into the details showed that
we broke the functionality with d6a64be5 while fixing #62.

Here, we fix the problem: connect to 127.0.0.1 via http on port 443.

Fixes #70

`easy_install` does not support https, which has been made mandatory for
pip packages. `pip` supports it natively.

See also https://github.com/clarin-eric/SPF-SPs-metadata/pull/224

See https://issues.shibboleth.net/jira/browse/SSPCPP-714

This reverts commit 6732a4fb.

CLARIN-DSpace "cronjob" endless loop in
[entrypoint-script](https://gitlab.inf.unibz.it/commul/docker/clarin-dspace/-/blob/master/dockerfiles/commul-customization/entrypoint.sh#L20-48)
check: nobody will notice stop - ping to get notified of failure.

Address #59