[PATCH 20 of 22] obsstore: make markerindex support serialization

[Jun Wu]

Excerpts from Pierre-Yves David's message of 2017-06-07 15:12:46 +0100:
> [...] 
> All other caches depending on store content still lives on the cache 
> directory. So I don't see a reason to make an exception here.

I think I have mentioned "shared repo". Why don't you think that's a reason?
 
> This patch in my other series makes available the proper vfs to access 
> the 'cache/' to the obsstore logic.
> 
> Cheers,
>