summary: Finch XMPP MUC crash
discoveredBy: Sadrul Habib Chowdhury
If a user in a multi-user chat room has a nickname containing '<br>' then
libpurple ends up having two users with username ' ' in the room, and Finch
crashes in this situation. We do not believe there is a possibility of remote
Correctly parse '<br>' so that it appears literally rather than as ' '.