Merge commit 'dd53af4b37c7790ce26065b36d5655c1af38b295'

This commit is a no-op. I don't want to enrange Certain People
who like to --disable-*.

* commit 'dd53af4b37c7790ce26065b36d5655c1af38b295':
  avplay: drop support for building without lavfi

Merged-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>