[arch-general] PulseAudio package group

[Jan Steffens]

I could make PulseAudio installation significantly easier by putting
specially-built packages (e.g. sdl-pulse, openal-pulse) into
[community] and grouping them in a "pulse" group.

This group would also include a "pulse-asoundrc" package containing a
pulse-configured asound.conf, as well as depending on alsa-plugins.

Should I go ahead with this? Any suggestions?