e2e: do not fail to start if no irc database exist yet

Implement SASL plain authentication

Add a missing ostream include

Makes the build fail, on some condition.

fix #3434

ci: Do not fail the packaging:rpm job if test:fedora did not run

ci: do not allow packaging jobs to fail

ci: Install the correct rtd_theme package, not the documentation…

ci: use the container tag instead of docker, for the build steps

This way, this will use either the docker or the podman runners.

The other steps still use only docker, because I didn’t solve the cache
issue on podman yet.

ci: Add sphinx_rtd_theme to fedora image to build the doc

ci: Use fedora:latest instead of doc-builder and fedora:oragono

Merge branch 'v8'

Release version 8.5

e2e: Switch from coroutines to async, for python3.8

Fix clang warnings on some utils function. It’s also faster

Fix a std::move() warning with clang

Fix a compile error with gcc 10

Fix #3431

Run the test against the oragono images

e2e: accept a regexp version of oragono, not just 2.0.0

Update the test docker images to contain oragono instead of charybdis

ci: Use fedora:oragono image

Create oragono TLS certificate automatically before each e2e run