Don’t use ! as the separator for nicknames, use % instead

It’s now easier to use. The distinction between a nick and a channel name is
based on the first character (by default it's '#' and '&'). The user doesn’t
have to worry about which separator to use anymore.

fix #3066

Update the links to the forge in README.rst

Start version 4.0

Release 3.0

Be verbose with make check

Test the version request, in many ways

Lower case the nick, when forwarding a version or ping request

Test the kick on a multisession nick

Rephrase an error message

Provide a --help option

fix #3183

test kick

Actually it works when we surrount the WHOLE string with quotes

Not just part of it

lol k gitlab-ci. It fails to parse a string that contains :

Trivial micro fix

ci: echo the cmake command line arguments

Document the multi-nick session thing

Do not use the logger before the configuration has been loaded first

Update the changelog by adding (all?) the changes in 3.0

Mark some more cmake variables as advanced

Fix the timeout test, now that we don't wait 1ms too much everytime