- two options request/ack_message_receipts
- two new theme parameters : CHAR_ACK_RECEIVED and COLOR_CHAR_ACK
- if a message has a receipt, the character is displayed between the
timestamp and the nick, using the color
- fallback to mediated invitations if only the bare jid is given to the
command or if the jid does not advertise support
TODO: provide a way to send passwords
- Add an option enable_carbons (defaults to false)
- Make a disco on non-roster entites to determine if the message
commes from a muc private chat or not.
