Update pacman.conf overlay to match new config from 3.3.2
Update pacman.conf overlay to match new config from 3.3.2

Trivial change: just update comments, and add community-testing repo.

Signed-off-by: Gerardo Exequiel Pozzi <f366e24919a755584052c42c8303af2b142d3e55@yahoo.com.ar>

dock0/dock0