servers: Fixed a race-condition in the RW replication, added links to...

servers: Fixed a race-condition in the RW replication, added links to stacktrace and rft in OSD status page.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@2499 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534