Restricted extra/addons

[Bryan Quigley]

Hi all,

Been looking at what's brought in by default by the restricted
checkbox in the installer and I think we can have better defaults.
Here is a brief summary of what we have today:

ubuntu-restricted-addons (what the installer checkbox does)
 - Flash
 - gstreamer1.0-fluendo-mp3
 - chromium-codecs-ffmpeg-extra
 - gstreamer1.0-libav (and dependencies are 114 MB)
 - gstreamer1.0-plugins-ugly (just 5 MB)
 - gstreamer1.0-plugins-bad (314 MB)

ubuntu-restricted-extras (what we recommend if on installed system)
 - the above ubuntu-restricted-addons
 - libavcodec-extra
 - ttf-mscorefonts-installer
 - unrar

Proposals (all just affect being in the metapackages, not in
archives).  I'm envisioning ending the -extras package.

Flash - remove
Adobe is officially killing it entirely at end of 2020 -
https://blogs.adobe.com/conversations/2017/07/adobe-flash-update.html
Apparently Mac OS may have stopped including it by default in *2010*.
Mozilla (and all browser vendors) will make Flash more inconvenient to
use in the 2nd half of 2018.  Requiring people to specifically install
it will make it easier to determine how many Ubuntu users actually
really want Flash.

gstreamer1.0-fluendo-mp3 - hoping we can provide MP3 support by
default soon like Fedora just did (right?).  Still on track for 18.04
or can that be pushed up?

gstreamer1.0-plugins-bad - remove
This is by far the heaviest item we bring in and from what I can tell
libav and ugly really cover the majority of codecs most people will
run into.   Bad plugins also likely provide an easy security target as
they say they have code quality issues.

unrar - remove
One of the biggest uses is with comic books, but apparently that can
be done for free these days -
http://www.omgubuntu.co.uk/2017/07/evince-3-26-will-let-view-adobe-illustrator-cbr-files
I also don't expect the use of unrar to be anywhere near the tasks the
other packages enables.

libavcodec-extra  - remove or move to -addons
no preference, doesn't seem like size is the issue

ttf-mscorefonts-installer - promote to -addons
Fonts missing is one of the biggest reasons documents in LibreOffice
don't like they do in MS Office.

Thanks!
Bryan