Merge tag 'v0.21.6'

release v0.21.6

NEWS

@@ -2,22 +2,28 @@ ver 0.22 (not yet released)
 * input
   - ffmpeg: allow partial reads
 
-ver 0.21.6 (not yet released)
+ver 0.21.6 (2019/03/17)
 * protocol
   - allow loading playlists specified as absolute filesystem paths
   - fix negated filter expressions with multiple tag values
   - fix "list" with filter expression
+  - omit empty playlist names in "listplaylists"
 * input
   - cdio_paranoia: fix build failure due to missing #include
 * decoder
   - opus: fix replay gain when there are no other tags
+  - opus: fix seeking to beginning of song
+  - vorbis: fix Tremor conflict resulting in crash
 * output
   - pulse: work around error with unusual channel count
+  - osx: fix build failure
 * playlist
   - flac: fix use-after-free bug
 * support abstract sockets on Linux
 * Windows
   - remove the unused libwinpthread-1.dll dependency
+* Android
+  - enable SLES power saving mode
 
 ver 0.21.5 (2019/02/22)
 * protocol