Drop support for botan < 2.0

fix #3274

Remove the now useless “find … touch” hack in gitlab-ci.yml

Correctly remove the last resource from the channel, in persistent mode

fix #3277

Add a failing test demonstrating 3277

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

Add a changelog entry for the roster feature

Send an unsubscribed presence on a probe if we don’t have a roster entry

Answer to presences of type='probe'

Document the biboumi and IRC-server JIDs in user’s roster

Add an e2e test for the IRC server roster presence

Only send the IRC server presence if the user has this JID in their roster

Implement the roster presences from IRC servers

Send an additional unsubscribed presence when receiving an unsubscribe one

Add e2e tests for the (un)subscribe thing

Send responses  when we receive an unsubscribed presence

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

Send the 332 status only for our own presences

Remove an unused variable

Replace a function argument from ... to the template Args&&... thing

Remove many log_debug from the database module