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etc. causes problems because the authentication module calls
note_*_auth_failure if authentication fails. This is inappropriate if access is
later allowed because of the IP.

So, instead of calling the auth_checker hook even if authentication failed, we
introduce a new access_checker_ex hook that runs between the access_checker and
the check_user_id hooks. If an access_checker_ex functions returns OK, the
request will be allowed without authentication.

To make use of this, change mod_authz_core to walk the require blocks in the
access_checker_ex phase and deny/allow the request if the authz result does not
depend on an authenticated user. To distinguish a real AUTHZ_DENIED from an
authz provider from an authz provider needing an authenticated user, the latter
must return the new AUTHZ_DENIED_NO_USER code.



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numbers themselves if they want, by allowing for
worker create/alloc functions to take a slot number id.
Done via _wid() variants of 3 proxy funcs.



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- move comment to correct location
- redirect temporarily instead of permanently to avoid potential problems
  with browser caches


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- log response status
- log Date and Server headers


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change log message when forcing worker into error state:
* APLOG_ERR instead of unsuppressible APLOG_NOTICE
* follow formatting of existing proxy messages more closely


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for additional auth types. This makes ap_note_auth_failure() work with
mod_auth_digest again.

PR: 48807


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It's no longer needed, since mod_rewrite now uses
our usual error log. The superfluous EOL was logged
as '\n'.

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explicitely giving a value.

Most modules only check presence of a variable, not the
value, so it makes sense to make the VAL argument in
the mod_rewrite ENV flag optional.

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Main page is fine, only the flags guide was wrong.

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don't go to the trouble of setting up the cache and mutex.


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and there's no compile-time default.


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PR: 49502
Submitted by: n verger txcx com 


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can't determine the content-length anyway.

Submitted by: Ruediger Pluem


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context of their own callback.

Breaks API, but we probably wanted an mmn reset between .6 and .7
betas for unintentional/unnoticed ABI breaks.

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