v0.2.2

Added

• Complaint reports that have lost their return path now find their message.
  Each message goes out with its return path token in an X-NitroMTA-Report
  header as well, outside its signature. Microsoft's reports carry no return
  path and no recipient, so this reaches a message with one recipient.
• reports_unmatched_total, the reports about none of the engine's deliveries.
• A page on deliverability: how warmup works, how provider settings layer, what
  each provider reports back, and how to configure warmup for any provider.

Changed

• The rules shipped in rules/receivers.toml give Outlook warmup defaults:
  half the shared ladder's pace to 10,000 a day, and a deferral holding a cap
  from 0.5%. [receivers.Outlook.warmup] overrides them, as any provider's
  settings can be configured. An egress already warming moves to them at its
  next judgment.

Fixed

• put_egress no longer changes a cap warmup is using. Run again, a line naming
  no cap removed the egress's own cap, and a line naming one set it back. It can
  still start warmup on an egress with no cap, and put_cap changes a cap after
  that.
• nitromta doctor no longer says to ask the provider about port 25 when this
  host does not hold an egress's address.