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If a specially crafted request was sent, it is possible to crash mod_dav, 
mod_cache or mod_session, as they accessed a field that is set to NULL
by the URI parser, assuming that it always put in a valid string.

PR: 49246
Submitted by: Mark Drayton
Patch by: Jeff Trawick


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for this problem quite a while back (see kb 921090), so restrict the
modified behavior to the old/unsupported browsers.

* docs/conf/extra/http-ssl.conf.in:
  (): tighten up the regex to only select old MSIE browsers for the
    downgrade in http behavior. this allows IE6 to run much faster.


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PR 49474


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I kept "back slash" when explicitely used in
comparison with "forward slash".


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PR 44195


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PR 42995


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PR 43906


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PR 49616
diagnosed by Andrey Chernov


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(i.e. symbol name with trailing "_module" removed) from the module_index.
To be used for logging.


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Not sure if 0.9.8 is correct, but checked that 0.9.7m doesnt have const.


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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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