e2e: add tests for the linger time option

ci: run apt update before apt install in packaging:deb

The form fields in the Configure ad-hoc commands are not required

ci: packaging:deb try move the build artifacts into the build directory

ci: packaging:deb, build for debian branch, include built .deb file

ci: in packaging:deb, override the before_script

Properly destroy the dns_handler socket when first start fails

To correctly exit the process

Actually, just use the C locale for the date formats

We don’t need any UTF-8 support here, and it’s more portable

Only use the C.UTF-8 LANG value

ci: add a packaging:debian job, based on the debian branch

Add some missing ifndef for udns

Cancel the IRC server linger timer when we try to-rejoin a channel on it

grammar: than <-> as

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