'X265' fourcc not recognized in AVI containers

VLC will fail to play AVI media with a video track featuring the X265 FourCC.

Debug log: https://pastebin.com/csG04wWq

Sample file: http://streams.videolan.org/issues/26853/

added Component::Demuxers label

changed the description

assigned to @fcartegnie

assigned to @fkuehne and unassigned @fcartegnie

mentioned in merge request !1816 (merged)

closed with commit adc1e739

closed with merge request !1816 (merged)

mentioned in merge request !1823 (merged)

mentioned in commit 1eaadd70

changed milestone to %3.0.18

added Status::fixed label