[PATCH] fio: Add ratemin/ratecycle/fsync options and lots of cleanups

[PATCH] fio: Add ratemin/ratecycle/fsync options and lots of cleanups

- Define max jobs and allocate threads in advance, was buggy
- ->mutex should default to locked for proper synced startup
- Add fsync option for fsync'ing for every N blocks on non-direct writes
- Add ratemin option for quitting the thread if min rate isn't met
- Add ratecycle option for setting rate average period
- Lots of cleanups