Author: Cameron Ball
MDL-56072 filelib: Add new groups and extensions.
This patch adds the following groups:
* html_audio: For source files of <audio> tags
* html_video: For source files of <video> tags
* html_track: For source files of <track> tags
It also adds the .vtt extension for track sources, and the flac
extension.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=676e5dcdccad8099807bd5895de36cdaedf1bf10
http://github.com/moodle/moodle/commit/676e5dcdccad8099807bd5895de36cdaedf1bf10
+ 3.2 en [text/vtt,core_mimetypes]
+ 3.2 en [video,core_mimetypes]