Please review wip/gcompris

Mainly an upgrade of gcompris version from a very old one to current
12.01.

It is found that this gcompris version does not work well with gstreamer.
Instead SDL mixer option is used which works pretty well.

Accordingly, --enable-sdlmixer added by default. As a fallout of this
MESSAGE
file that asked to install gst-plugins deleted.

Buildlink added for sdl-mixer, py-cairo, librsvg, libxml2 due to new
dependencies.

configure script has made gnet a default option. So instead of enable-gnet
disable-gnet code is added to Makefile depending on pkg option.

Patches from games/gcompris are still applicable and are taken in with due
modifications.


I realize, the top line with revision tag is not showing correctly in all
files. It is showing same revision as of copied from pkgsrc. How to adjust
that?
Mayuresh

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