Remove the embedded sha1 code, and use one of botan or gcrypt

This adds a hard dependency on one of Botan or gcrypt. Botan is already a
recommended dependency, and gcrypt is probably packaged almost everywhere,
so this should not be a big deal.

ref #3241

Fix the order of from and to address in muc traffic info reply

And add a test for it.

fix #3238

Don’t wrap the lines in docker/README.md

ci: remove packaging:docker

Use markdown for the docker readme

Revert "Split the biboumi dockerfile into two, to be able to disable the cache"

This reverts commit 26eb28dc2368d14e171201a0c6b76b76b19e1ddc.

e2e: Add an outgoing_bind= conf option

Use AI_NUMERICHOST when using getaddrinfo to bind() our client sockets

Remove the sonar-qube build

[ci skip]

Add a test for the ad-hoc command disconnect-from-irc-server

Also test the channel config on a fixed_irc_server instance

Split the biboumi dockerfile into two, to be able to disable the cache

Add a irc channel ad-hoc configure test

Use uname() instead of CMAKE_SYSTEM

fix #3235

docker: fix the SECRET->PASSWORD in entrypoint.sh

docker: Add the XMPP_SERVER_IP option, and document the --network=host usage

docker: Properly handle and document the /var/lib/biboumi directory

ci: remove all mention of docker.io in packaging:docker

ci: Empty the before_script for the packaging:docker job

ci: Add a packaging:docker job that builds and push to the image docker.io