support for IMAP custom labels
|Reported by:||pulkomandy||Owned by:||czeidler|
|Has a Patch:||no||Platform:||All|
IMAP allows for custom labels to be added to messages. This could be mapped to attributes in some way. I'd like some of the $Label1 ones (used by thunderbird) to get exposed, as that would make managing my mail under haiku a lot more easier.