client:

- Added warning about issue 226 to xtfsutil if user sets replication policy to "all" / "WaR1"
- Fixed check in xtfsutil if replication policy is already set.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@2772 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534