client:

- Fixed compilation of Interruptibilizer on non-Linux plattforms.
- Made ifdefs consistent.
- Corrected style of documentation to internal (yet unwritten) guide line.


git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@3037 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534