[Proposal] Different Visibility Options for Photos

[Nya0]

enum PhotoVisibility
{
    Public,
    FriendsOnly,  // only friends can see it
    Private,      // visible to uploader only
    Moderation,   // visible to mods and uploader
    Unlisted      // only accessible by link
}

it would help extend the current functionality of photos to other uses. grief reports would benefit from this will remove redundancy and give all user facing pictures some backbone