Check the new Mpd specifications

[cedlemo]

The Mpd specifications have been updated:
https://www.musicpd.org/doc/html/protocol.html#general-protocol-syntax

[cedlemo]

• Requests -> ok
• Responses
  - Binary Responses -> Mpd Binary response #21
  - Failure responses -> ok
• Command lists -> To do
• Ranges -> To improve
• Filters -> To do
• Escaping String Values -> To check
• Tags -> To check
• Other Metadata -> To check
• Command reference
  - Querying MPD’s status -> To check
  - Playback options -> To check
  - Controlling playback -> To check
  - The Queue -> To check
  - Stored playlists -> To check
  - The music database -> To check
  - Mounts and neighbors -> To check
  - Stickers -> To check
  - Connection settings -> To check
  - Partition commands -> To check
  - Audio output devices -> To check
  - Reflection -> To check
  - Client to client -> To check