http: follow up to r1685345, also needed in 2.4.x/2.2.x by r1686271/r1687339.
Handle reentrance of state BODY_CHUNK_CR to avoid AH02901 when we eat BWS
from multiple reads.

http: follow up to r1685345.
Be lenient up to 10 (room for 32bit decimals) Bad White Spaces (BWS)
between chunk-size and chunk-ext/CRLF.

Submitted by: ylavic
Reviewed by: ylavic, jim, wrowe


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testing is done on possible fixes (r1686853, r1686856).

Reviewed by: wrowe, jim, ylavic


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should these be reverted.

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http: Fix LimitRequestBody checks when there is no more bytes to read.

Submitted by: Michael Kaufmann <mail michael-kaufmann.ch>
Committed by: ylavic
Reviewed  by: ylavic, mrumph, wrowe


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