quickstart gives incorrect info about multicast addresses, now corrected.

BKrev: 40d35b80BGcr_8TvtSlrbEZBn14zZA


git-svn-id: http://svn.fedorahosted.org/svn/corosync/trunk@16 fd59a12c-fef9-0310-b244-a6a79926bd2f