[MERGE][#294479] Make InterPackRepo set the packer cache size even when there is stacking.

[John Arbash Meinel]

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Andrew Bennetts wrote:
> Andrew Bennetts wrote:
>> This is a bit ugly, but it's the least intrusive fix I could see.  It would
>> be nice if stacked pack repositories didn't hit a completely different (and
>> apparently buggier and slower) code path than non-stacked pack repositories.
> 
> So, here's a different fix for this case:
> 

I personally prefer this fix in the short term. I think we need to fix
the "general" fetch logic, but that is a larger scale fix that can then
be done correctly, rather than trying to wedge little workarounds in.

John
=:->

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