Add wmertens to maintainers
a52dec: Add patches from Handbrake project

this project hasn't been updated in 10 years, so adding patches that
don't break the API should be ok.

Patches:
- A00: Make a52-state-t public
- A01: Make it thread-safe (changing internal API by adding state
objects)
- A02: Quell common error
- A03: Fix for automake vs autoconf
libbluray: Add patch from Handbrake project

- A01: Make it smarter about filtering duplicates
libdvd{read,nav}: Version bump and patch from Handbrake project

- API-compatible version bumps to latest upstream
Patches:
- A08: Adds API call to duplicate a DVD VM to libdvdnav
- P00: Skip making examples
libmpeg2: Add patches from Handbrake project

libmpeg2 is abandoned upstream.

Patches:
- A00: Fix tag handling on frames
mp4v2: Add patches from Handbrake project

mp4v2 seems abandoned upstream.

Patches:
- A00: Add API call for subpicture subtitles
- A01: Fix divide by zero
- A02: Give a meaningfull error when hitting 4GB limit
- P00: Fix compilation with mingw32
libmkv: from Handbrake project

Libmkv was started from Handbrake but is now unmaintained upstream.

Patches:
- A01: add constant to header file
- A02: Breaks API: Allow changing output sampling frequency
- P00: Fix accessing large files on Mingw32
Add Handbrake 0.9.9: DVD ripper

This packaging splices off the unfree faac library and forces handbrake
to use the (more recent/patched) versions of libraries in Nixpkgs.
Produces the CLI HandbrakeCLI and optionally the GTK+ version ghb.
handbrake: disable unfree faac, as it doesn't build with it
Merge #2487: add handbrake and update/patch dependents