Add a <item/> node in the presence of a leaving participant

fix #3339

Remove the virtual channel feature altogether

Merge branch 'patch-1' into 'master'

Change max line length to more conservative constants

See merge request louiz/biboumi!21

Change max line length to more conservative constants

Add support for the "history" node on MUC join

Supports the "seconds", "maxstanzas", "since" and "maxchars" (but only =0)
attributes.

fix #3270

Small refactor in on_quit()

Don’t forget to remove the user from the channel, when kicked

fix #3291

Merge branch 'biboumi_jid_in_users_rosters' into 'master'

Use a db roster to manage biboumi’s presence with the contacts

Closes #3217

See merge request !13

Implement the roster presences from IRC servers

Send status code='332' on biboumi or IRC server’s shutdown

Send a 110 status code on a QUIT received for ourself

Remove a bunch of useless string_literal usage

Merge branch 'orm' into 'master'

Pure c++ sqlite3 ORM

Closes #3271

See merge request !11

Implement our own database ORM, and update the whole code to use it

Entirely replace LiteSQL

fix #3271

Handle messages 367 and 368 to display the banlist in the MUC

fix #3234

Refactor the channel::self to point at the existing user

This way, the user is always up to date, instead of being a duplicate out of
sync.

fix #3258

Redirect welcome NOTICE to their channel, instead of sending a global one

fix #3236

Fix a segmentation fault when connecting to a server without a port

fix #3260

Fix a segmentation fault when connecting to a server without a port

fix #3260

Make sure we don’t exceed 512 bytes when grouping JOINs