These tests require that fixed_irc_server is set, and will fail if
another test sets them.
This may not have been a problem before, but since the catch2 update CI
has encountered issues running these tests randomly, as the order of
which tests are ran in is now random.
RFC 2812 specifies in §1.3 that “Channels names are strings (beginning
with a '&', '#', '+' or '!' character) of length up to fifty (50)
characters.”
We previously only allowed the first two prefix characters, or any other
one if the server overrides the list with ISUPPORT.
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
Luca Matei Pintilie