#28 MUC: edit affiliation lists

[Magnus Henoch]

In MUC, you can change people's affiliation if you are an admin (e.g. outcast (banned), member, admin...). But you can't get a list of people who are one of these, and edit their affiliations. For example, if you want to unban the person you banned last week, you have to remember his/her JID and type it in by hand.

jabber.el should be able to fetch the affiliation lists, and present an interface for editing them.