Log Message:
Updated libmpdclient to 2.11.

libmpdclient 2.11 (2017/03/20)
* fix heap corruption with mpd_connection_new_async()
* add space before "window" search argument
* detect getaddrinfo() at configure time
* add support for ArtistSort and AlbumArtistSort tags
* support MPD protocol 0.21
  - audio format specifications "dsd64" etc.
  - the "sort" parameter for commands "find"/"search"