We should call FindLock() inside AcquireLock() regardless of boolean ignoreProcesses

- FindLock(cflock) does not only look for the existence of the cflock lock but also creates it if it does not exist.
- This is independent from whether ignoreProcesses is set or not
- It also affects yielding of locks because cflock needs to exist in order to be yielded
Merge pull request #1427 from jeffali/fix/lock_fileedits

We should call FindLock() inside AcquireLock() regardless of boolean ignoreProcesses