Story #8823: Recent Apache and OpenSSL combinations break connectivity on Ubuntu 18.04
Install Apache 2.4.39 and disable TLSv1.3 on CNs
Apache 2.4.39 is needed to avoid a lengthy connection time, however it offers TLSv1.3 which seems to break at least python client.
Task is to install 2.4.39 but disable TLSv1.3 for now with:
SSLProtocol all -TLSv1.3 -SSLv2 -SSLv3