OSD: OSDs now advertise their UDP endpoints to the DIR, in addition to the oncrpc endpoints

interface: added new constants for replication
MRC: the first replica of a file will now be marked as 'full' when the file is made 'read-only'

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@751 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534