[sheepdog] [PATCH] Convert config file - the free disk space is now stored in the config file

[Jens WEBER]

> > a version number of the config file would also be nice then there is less 
> magic
> > 
> > struct sheepdog_config {
> > +	uint16_t configversion; <- what do you think
> > 	uint64_t ctime;
> > 	uint64_t space;
> > 	uint16_t flags;
> > 	uint8_t copies;
> > 	uint8_t store[STORE_LEN];
> 
> Sounds like a good plan, but preferably the version number should be
> after the old config data, so that the lack of it can be used to signal
> that it is a "version 0" format.
> 

We need to clean up the config file once because it has changed. I think config version in first place is better style - but I'm not the expert here.