[sldev] Frequent bugs with difficult repros

[Soft]

MISC-963 is the start of a list of lingering bugs that are commonly
experienced, but which haven't been fixed because they're tough to
reproduce at will. Double-chats in IM groups or errors starting chat
would be good examples of this.

If you can think of any such issues, please link them against
https://jira.secondlife.com/browse/MISC-963

If you can do some sleuthing, put a watch on MISC-963 and take a look
at new issues when they're linked up.