[Cin] Clarification (bug tracker and mailing-list)

[Andrea paz]

Hi.
I saw that the Bug Tracker also includes requests for new features,
not just Bug. For example, new features for masks. If I want to
request a new feature should I use the bug tracker or mailing-list?
Another question: If I want to add other features to a bug already
written by others (e.g. more options to the mask bug), can I add it to
the existing bug (with a note) or do I have to create a new one?