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cache_fetch.c now reports the response code or a indicative negative
status for failed requests to the backend code.

Any timeouts, keepalives or other overhead processing of health codes
should happen in a thread in the backend handling.



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acceptor code on a timeout.



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an infinite loop on certain OS's.


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Get rid of the httptag enum, we can use the HTTP_T values instead.

Introduce WSP macro to wrap log entries which has a session.

Add our own vctyp() character classifier to simplify HTTP protocol
message parsing.

Unify http_DissectRequest() and http_DissectResponse() processing.

Unify writing of the 5 byte SHMLOG header and other minor cleanups
to shmlog code.

Silence some signed/unsigned/int width warnings in FlexeLint






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over sockets and things which manipulate them in memory.



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the containing object (session or obj).


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Reported by:	Martin Aspeli <optilude@gmx.net>



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typedef it as "txt" instead.



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have a <sys/queue.h> that differs in small but important details from what
we expect.  Replace our "queue.h" (which was taken from NetBSD) with a new
"vqueue.h" which is based on FreeBSD's <sys/queue.h> with the debugging
taken out and a "V" prefix added to everything.


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use <sys/queue.h> instead of our own if present.


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A couple of XXX comments
Some returnvalue asserts
Some pdiff() uses
Change WRK_Flush() to return unsigned



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