Merge commit 'bdbb8c68'

* commit 'bdbb8c68':
  doc: Add libxavs section
Merged-by: Clément Bœsch <u@pkh.me>

doc/general.texi

@@ -101,6 +101,14 @@ Go to @url{http://www.wavpack.com/} and follow the instructions for
 installing the library. Then pass @code{--enable-libwavpack} to configure to
 enable it.
 
+@section libxavs
+
+FFmpeg can make use of the libxavs library for Xavs encoding.
+
+Go to @url{http://xavs.sf.net/} and follow the instructions for
+installing the library. Then pass @code{--enable-libxavs} to configure to
+enable it.
+
 @section OpenH264
 
 FFmpeg can make use of the OpenH264 library for H.264 encoding and decoding.