fate: support testing of release branches

Adding 'branch=release/10' to the fate config file will check the
release/10 branch instead of master. If no branch is specified it will
use 'master' so that existing config are still valid.

The server side changes are already deployed, see
https://fate.libav.org/v10/ for an example. The server supports only the
release/* branches.

The server enforces that a single slot tests always the same branch.
Please append "-v$RELEASE" to the slot of release branch configs or make
the slot otherwise unique.

A different fate samples dir is needed for each release branch. make
fate-rsync has the correct URL in each branch.
Merge commit '42eb9154a83e9a7aedb1168b2f1112af765cf2b5'

* commit '42eb9154a83e9a7aedb1168b2f1112af765cf2b5':
  fate: support testing of release branches

Conflicts:
	tests/fate.sh

The communication protocol is left at version 0 as our fate server
hasnt been updated to support this yet

Merged-by: Michael Niedermayer <michaelni@gmx.at>
fate/hevc: update fate with 9 bitstreams
- all of them testing HEVC version 1

cherry picked from commit adcdabb4dd062694fb8de6df0faecaad1c36ba33

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Fix standalone compilation of the legacy mpegvideo decoder.
Fix standalone compilation of the legacy mpegvideo decoder.

Second try.
Fix standalone compilation of the webm_dash_manifest demuxer.
doc/decoders: mention native Opus decoder

Signed-off-by: Lou Logan <lou@lrcd.com>
hevc: remove non necessary parameters to ff_hevc_set_qpy

cherry picked from commit 6f58c111ad9920d983bb18eacf901193bac5d937

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