client:

- Changed busy-wait interval in SleepInterruptible() to two seconds.
- Reformatted interrupt.cpp file after accidental Ctrl-Shift-F commit.


git-svn-id: https://xtreemfs.googlecode.com/svn/trunk@3176 f8528748-c2c0-11dd-ba5c-d3b7c2b3b534