foundation: Fixed error message that the server could not set the socket...

foundation: Fixed error message that the server could not set the socket buffer size to 256 kB by removing this value and using the default value instead.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@3450 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534