using OpenSSL 1.1.0.

This API is now a no-op in OpenSSL 1.1.0 and
deprecated.


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Don't crash when ap_rgetline() returns a NULL field on ENOSPC.


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for abusive and malformed traffic the non-technical consumer of a user-agent
has no control over.

Simply take note where the administrator-configured limits have been exceeded,
that administrator can find details in the error log if desired.



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of killing trailing whitespace to the purpose-agnostic read logic.

Whitespace before or after an obs-fold, and before or after a field value
have no semantic purpose at all. Because we are building a buffer for all
folded values, reducing the size of the newly allocated buffer is always
to our advantage.



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Testing len > 0 is redundant when *field is a "\0" and mismatches here,
folded flag was a no-op, unused once we added continue; logic.
Fix these as initially attempted in r1755114.

Add some comments to make this code slightly more legible to the reviewer.



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as with r1755098, but this time ensure the previous header processing logic 
ensures there was a previous header as identified by jchampion.

This patch restructures the loop for legibility with a loop continuation,
allowing us to flatten all of this hard-to-follow code. The subsequent
patch will be a whitespace-only change for formatting.



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noted by Jacob Champion, discarding my work of today.



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folded flag was a no-op, unused once we added continue; logic.



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This patch restructures the loop for legibility with a loop continuation,
allowing us to flatten all of this hard-to-follow code. The subsequent
patch will be a whitespace-only change for formatting.



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We agreed to consider r1752347 as bug fix and delay performance improvements
for later revisions.



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is true.



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to simplify logic, no functional change.



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