Add a linger_time configuration option on IRC servers

Do not require revocation info for a certificate to be valid

If anyone has any reason to believe this is a bad idea, please let me know.

Refactor and split the Dockerfiles, to build a base without litesql

Update INSTALL.rst to talk about botan-2, and give priority to 2 over 1.11

Look for botan-2 in addition to botan-1.11

Add missing <algorithm> include for last commit

Only try to join chans only once, even if we received multiple presences

ref #3228

Fix some issues found by sonar cube

Add a missing errno include

Fix an use-after-free

Because we “delete all node” and then we use the content of one of these
nodes we got earlier.

Use udns instead of c-ares

fix #3226

Add libasan and libubsan in the test docker images

Remove the PrintBuildParameter make target

Use fsanitize=address and undefined in debug builds if ubsan and asan are there

The “build” badge links to a more useful URL

Update the DockerFiles to include openssl

Update the doc to avoid using “” or "" and other chars

CI: Use our own registry for docker images

Send iq error/result when the user changed a MODE command  with an iq

And add tests for all the mode changes

Use the codecov badge instead of the gitlab coverage one

[skip-ci]