DiskDevice API 2.3 remarks

Howdy,

while looking a bit more through the headers I found some more details, 
I want to `complain' about. ;-) I hope, I don't warm up too many 
things, we've already discussed. In case I do, please accept my 
apology. I'm an old man and my memory isn't what it used to be. ;-)

* uint8 BDiskDeviceJob::Progress() const;
I would love to see a float return value. I'd say, the most natural 
range for it was [0, 1], but as BStatusBar's max value defaults to 100, 
I could live with that, too. The same goes for 
B_DISK_DEVICE_JOB_SIMPLE_PROGRESS, of course.

* BPartition::SetParameters():
It should read `const char *contentParameters'.

* BPartition::ValidateInitialize():
Why is it gone? Perhaps there was a reason, but I can't remember. 
BDiskSystem::ValidateInitialize() is still there, though. If the method 
was removed by accident and we want to have both, then they should have 
a `const char *parameters' argument (that would be content parameters, 
of course).

* Would BDiskSystem::ValidateSet{Child}Parameters() make sense?

CU, Ingo