Plug AllowTrace extended|on|off into proxy and http core.

  It still is not 'correct' until REQUEST_CHUNKED_PASS is reimplemented
  and passes some chunk headers, since we aren't echoing the entire
  request.  But it gets me further on testing 1.3 -> 2.0 -> 2.1 -> 2.0 -> 1.3
  proxy behaviors.


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  Initially a no-op.  Add trace_enable configuration.  The http and proxy
  flavors of interpreting this flag are yet to be committed.


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  Whoops - two things at once.  Document MAGIC_COOKIE "AP21"

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  Change Apache httpd 2.1 signature to "AP21" as this flavor
  is binary-incompatible to any "AP20" module.


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to apr_socket_send.  Remove redundant _shutdown call.


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*) server/mpm_common.c: Send a simple HTTP 1.0 request to every listener socket, instead of just closing the socket.  This fixes shutdown of the Worker MPM on FreeBSD, when Accept Filters are enabled.

In the future, we need a method to send a simple request for all protocols.  Currently this is very specific to HTTP and FreeBSD's Accept Filter.


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some of the text that makes this feature seem less useful than it
actually is.


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  More cleanup, organization to make README easier to follow.


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  Rearrange some deck chairs, just reformatting, axing unmaintained
  'Binaries' section.

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- If the Protocol has not been set, do not crash.  Long term, we need to ensure that the protocol is set in all cases, and in all MPMs.


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Submitted by: Eric Covener <covener gmail.com>
Reviewed by:  trawick



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Content-Length, remove the Content-Length and don't reuse the
connection, stopping some HTTP Request smuggling attacks.


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used uninitialized" warning; fix validation of digest-uri for CONNECT
requests:

(copy_uri_components): Copy the hostinfo field.
(authenticate_digest_user): Don't pass NULL (or, previously, a random
pointer) to strcmp if a digest-uri is provided which doesn't match the
request-uri in a CONNECT request.


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header if any Transfer-Encoding header is present, regardless of
value.

Reviewed by: Paul Querna, Jeff Trawick


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another valid variable-may-be-used-uninitialized warning from GCC 4
(in the !balancer->sticky case, find_session_route returns NULL
without setting route).


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* adjust the mime type directory in mod_mime.xml.ja as well (to get it uptodate
  again)
* `build all`


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RewriteMap


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Submitted by:        Steve Kemp <steve steve.org.uk>
Reviewed/tweaked by: trawick



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Submitted by: Christian Schubert <mail apexo de>
Reviewed by: niq


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otherwise ajp-proxy hangs when Transfer-Encoding is "chunked".


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  caddr_t is quite non-portable, but a (void*) will do the trick.


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