0.27.0

BREAKING CHANGES

• MonitoredCommandInfo::server_addr is replaced by source. The field held
  the address of the client, not of the server, and could only be a
  SocketAddr. It is now a MonitoredCommandSource: Client(SocketAddr) for a
  TCP client, Lua for a command run by a script or a function, Unix(String)
  for a client on a Unix socket, and Unknown(String) for any other form.

Fixed

• MonitorStream no longer drops script, Unix-socket and IPv6 commands.
  MONITOR reports the source of a command run by a script as [db lua], of a
  Unix-socket client as [db unix:/path] and of an IPv6 client as
  [db [::1]:port]. The parser read the source as a SocketAddr and closed the
  field at its first ], so all three failed to parse, and the stream skipped
  them without a trace: a consumer never saw what a script ran. The three forms
  are now parsed, and a form the parser does not know is delivered as
  MonitoredCommandSource::Unknown instead of being skipped.

Added

• MonitorStream::undecodable_messages counts the events the stream skipped
  because it could not decode them, the way dropped_messages counts the ones
  it discarded under memory pressure.