~disable dummy email backend
+caching (memcached)

As described at
https://github.com/iepathos/django-memcached-openshift#if-you-install-from-the-main-repo-above-then-you-will-only-need-to-edit-3-files-to-get-memcached-working
~about (thanks, --coming soon)
~caching env var fix
~fixed captcha, ~fixed secrets import in dev