client: Disabled asynchronous writes until retry/redirect support is available...

client: Disabled asynchronous writes until retry/redirect support is available (currently does not work well with replication). Append --max-writeahead=1310720 to the command line to enable asynchronous writes.

git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@2594 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534