lavc/pthread: copy packet side data.
lavd/xv: take aspect ratio into account.
lavfi/af_atempo: clear references before returning error.

Once the frame has been given to ff_filter_frame(), it can
no longer be used, even on error.

Fix trac ticket #3430.
lavf: add subfile protocol.
lavf/concatdec: more reliable test for absolute URLs.

ff_make_absolute_url() recognizes the "://" pattern usual
in HTTP-like protocols, but consider relative URLs starting
with just the protocol name or using the comma syntax for
options.
lavf/concatdec: reindent after last commit.
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>