v0.8.2

Breaking changes

• copy is configured in a [copy] section now, not on the jobs themselves. It named its two
  mailboxes by tagging them role = "source" / role = "destination", which put a command that
  never touches an archive into the middle of the job list and left --job unable to address it.
  The section names the jobs instead, so a [[job]] again says only how to reach a mailbox:

  [copy]
  source = "source_account"
  destination = "destination_account"
  move_to_folder = "Old/%Y"

  A name matching no job, or the same job on both ends, is now refused before anything connects --
  the latter would have copied a mailbox onto itself

• move_to_archive and archive_folder are one option, [copy] move_to_folder. Naming the
  folder is what turns moving on, so the separate switch is gone, and the old name claimed the word
  "archive" for something that is not one: everywhere else in this tool an archive is the local
  store, while this is a folder on the source server. Replace move_to_archive = true plus
  archive_folder = "Archive/%Y" with move_to_folder = "Old/%Y" in the [copy] section

  Each retired option is reported by name when the configuration is loaded, so nothing changes
  behaviour quietly -- but a configuration that still uses them has no [copy] section, and copy
  stops rather than guessing