mod_cache: scoping directives to per directory/location

[Graham Leggett]

Hi all,

In the case of some of the mod_cache and mod_disk_cache directives,  
there isn't a reason to force these directives to be server wide, they  
can be per location instead. These are mainly directives that control  
what goes into the cache, like CacheStorePrivate, CacheStoreNoStore,  
and CacheMaxExpire.

The criterion for this to be possible is that the directive must  
control what goes into the cache, rather than what comes out. What  
comes out of the cache is handled in the quick handler, and the  
directory and location walks are bypassed, hiding the directives.

Regards,
Graham
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