Log Message:
musicpd: Update to 0.21.13

ver 0.21.13 (2019/08/06)
* input
  - cdio_paranoia: require libcdio-paranoia 10.2+0.93+1
* decoder
  - mad: fix crackling sound (0.21.12 regression)
* output
  - jack: improved Windows compatibility

ver 0.21.12 (2019/08/03)
* decoder
  - mad: update bit rate after seeking
  - mad: fix several bugs preventing the plugin from decoding the last frame
  - opus: ignore case in replay gain tag names
  - opus, vorbis: decode the "end of stream" packet
* output
  - jack: fix mono-to-stereo conversion
* player
  - don't restart unseekable song after failed seek attempt
* Windows
  - support backslash in relative URIs loaded from playlists