[Pvfs2-developers] Hint patch

[Julian Martin Kunkel]

Hi,
I attached a patch which implements the hint mechanism for PVFS2 the way we 
use it right now. 
For people not reading all the messages from the mailing list: We had a 
discussion about hints a couple of month ago. A hint allows to transfer a 
string through the layers to the server and down to Flow/Trove and parly BMI 
(where it makes sense).

I had to stripe quite some functionality to reduce the patch to its core just 
providing the hints (and a handful of really small modifications) and to 
merge the functionality to the recent CVS version (with concurrent 
statemachines). 
Therefore, I hope I did not break something, basic operations 
seem to work. Most the time the patch is really straightforward.
I left the "Request ID" hint and the kernel code modifications to transfer it.
However, the patch contains a handful redundant variables....
Well, I sent it even if it is not perfect to reopen a potential discussion 
about the future (and hopefully final) implementation ;-)

Best regards,
Julian
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