Permissions for access, and race handling

In a local OSD implementation context, permissions shouldn't be a significant issue - but if the APIs are opened
up to open web or third party applications which can run at the same time with other users of the TV API, there is
the inherent risk of abuse (two users of the API racing tuner access) and user fingerprinting. (privacy issues, related
to permissions and not racing)

I believe it would make sense to integrate [1] a permission model for the elements that are either sensitive and
describe how to deal with multiple applications fighting for access. (e.g. a buggy background application switching
the channel while the user is watching another channel)

Sangwhan

[1] http://www.w3.org/TR/permissions/