mpd: 0.20.13 -> 0.21.16 (#57608)

* Refactor mpd

* mpd: 0.20.13 -> 0.21.5

Switch to meson based build, following upstream.

* Fix mpd on darwin

* mpd: 0.21.5 -> 0.21.6

* mpd-small: init add 0.21.6

* Update to 0.21.8 & fix ouput path

Also use pname instead of name.

* Update to 0.21.9

* Integrate review suggestions

- Expose run function as mpdWithFeatures.
- Throw on invalid feature requests.
- Drop major/minor version variables.
- Cosmetic improvements.

* Update to 0.21.10

* mpd: 0.21.10 -> 0.21.11

* mpd: 0.21.11 -> 0.21.12

* mpd: log to journal

* mpd: 0.21.12 -> 0.21.14

* mpd: add tobim to maintainers

* mpd: reenable syslog support

* mpd: 0.21.14 -> 0.21.15

* mpd: 0.21.15 -> 0.21.16