Merge remote-tracking branch 'cigaes/master'

* cigaes/master:
  lavf/concatdec: reindent after last commit.
  lavf/concatdec: more reliable test for absolute URLs.
  lavf: add subfile protocol.
  lavfi/af_atempo: clear references before returning error.
  lavd/xv: take aspect ratio into account.
  lavc/pthread: copy packet side data.

Merged-by: Michael Niedermayer <michaelni@gmx.at>