fn retie_project(id: String)Expand description
A project’s routes changed: the mail already here that only its text or an
attachment ties to it, tied now, on a thread (routes on the sender and the
subject are matched again each time the project shows). Each message as
the Porch takes it (porch::Gate): never one it sets aside (a blocked
sender, forged, a borrowed name, spam a route does not protect).