Add the FindCARES cmake module

Implement async DNS resolution using c-ares

fix #2533

Fix typo

Use a timer to try reconnecting to the XMPP server only each 2 seconds

When the connection is lost, immediately try to reconnect, then try to
reconnect every 2 seconds.  This is much better than the previous “Try to
re-connect as fast as possible”.

Remove the XmppComponent::last_auth bool that was never used anywhere

Properly display [DEBUG] on debug lines, instead of [ERROR]

Fix “connections” typo

Fix “cleanely” typo

Add a tl;dr section in the INSTALL file

Add a missing #include for sockaddr_in6

Fix the include guard of revstr.hpp

Document the new affiliation/role stuff, and update changelog

Change IRC modes when receiving an affiliation/role change request

fix #2946

Remove a recent debug line that should not be there

Update changelog with the password feature

Do not send an empty password at all, if the user didn't provide one

Make the password work when we join our first channel on that server

Because we need to wait for the welcome message, when we connect to the
server, before sending the JOIN command, we need to also save the value of
the password to reuse it when we actually send the JOIN command

Fix a little bit of style stuf from previous commit

Add support for password-protected IRC rooms.

Remove a dummy commented line