Avoid adding more that one “XMPP reconnection” timed event at the same time

Fix a semblance of infinite and busy loop, that could occur if biboumi’s
poller is woken up multiple times while the XMPP server is not reachable.

Avoid building test_suite when we make install

Handle the RSM "max" value in the MAM requests

fix #3255

docker: Run the process using “exec”, to be able to cleanly receive signals

Always chown biboumi /var/lib/biboumi when the docker container starts

This fixes permission problems when we bind a volume that is not owned by
the biboumi user.

Add an e2e test for the ad-hoc reload command

Change the dates of source files before each build, to avoid useless rebuild

Properly handle multiline topics

fix #3254

Add an e2e test for the ad-hoc ping

Apply a few clang-tidy cppcoreguidelines-* fixes

Trivial change in the doc

Apply all the clang-tidy performance-* fixes

Fix the display of the number of checks to be run by the e2e tests

Apply all the clang-tidy misc-* fixes

Apply all the clang-tidy modernize-* fixes

Add a paragraph describing the automated tests

Do not allow pings from resources that aren’t in the channel

fix #3252

Handle some iq of type='error' as valid ping response

fix #3251

Talk about debug logs in contributing.rst and a gitlab ticket template

Merge branch 'patch-1' into 'master'

Fix typo in CHANGELOG.rst biboumi → botan

See merge request !8