mod_cache: use of ap_log_error() instead of ap_log_rerror()

[Graham Leggett]

Hi all,

Across mod_cache, all the logging directives log at the server scope  
using ap_log_error(), instead of at the request scope ap_log_rerror().

While I suspect the original intention of this was because the  
quick_handler() is involved, is it true to assume that the  
ap_log_rerror() request scope logging function can't be used in a  
quick_handler()?

Hoping that someone who knows the logging stuff better than I do can  
confirm, because I'd like to use ap_log_rerror() across the board if I  
can.

Regards,
Graham
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