Right now we spend CPU&RAM to keep the built hash-string around, in case
we want to hit it with purge_hash later on.

purge_hash was made so that you could purge content on a particular
vhost without affecting other vhosts, but due to the wierd syntax,
it is not very convenient for this purpose.

The proposed change is to add a new purge primitive that takes a
list of (header, regexp) pairs, for instance:

        purge Host host3 URL "\.jpg$"

But once you think about it, you can do really wierd things:

        purge STATUS 404

        purge Set-Cookie "USER=9348395"

Comments welcome...

Poul-Henning

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
p...@freebsd.org         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.
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