Log Message:
musicpd: update to 0.23.4.

ver 0.23.4 (2021/11/11)
* protocol
  - add optional position parameter to "searchaddpl"
* decoder
  - ffmpeg: support libavcodec 59
* output
  - alsa: add option "thesycon_dsd_workaround" to work around device bug
* fix crash on debug builds if startup fails
* systemd
  - remove "RuntimeDirectory" directive because it caused problems
  - ignore the "pid_file" setting if started as systemd service
* Windows
  - enable the "openmpt" decoder plugin