[PATCH 22/28] elf: Add extension mechanism to ld.so.cache

[Florian Weimer]

* Adhemerval Zanella:

>>> Ok, although I think we should be good move the 'opt_format' definition to
>>> a proper enumeration.
>> 
>> Can this wait?  Something for a future patch?
>
> Alright, although it does simplify reading this patchset and the
> change should most mechanical. 

I'll add a separate patch for this to the start of the series.

Thanks,
Florian
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