fn attach_limit(
phone: Option<&Entry>,
id: &str,
) -> Result<(u64, u32), &'static str>Expand description
What a multimedia message from here to a conversation may weigh (bytes)
and its pictures’ long side at most (0 none), from the phone that sends
(weigh); else why nothing can be attached, its words’ key: no phone, a
group (a later step), the phone not having said what its carrier takes
(Attach is offered only once it has, decision 11), its carrier taking none.