Remove unenforceable requirement to strip whitespace

[dyladan]

Requiring OWS to be stripped when the header is parsed into a data structure is unenforceable and unnecessarily prescriptive. This specification deals with the wire format, not the in-memory representation of the data it carries. OWS should either be allowed or not and the implementer can decide if it should be stripped.

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[yurishkuro]

I agree that we cannot dictate the processing of the tokens, but I think the intention of those clauses was to say that whitespace is not part of the tokens. I.e. if I receive key=" abc" I am allowed to send it further as just key="abc", I am not required to preserve whitespace. Unless we say that elsewhere, I would suggest not removing the clauses but rewording them.

[dyladan]

I agree that we cannot dictate the processing of the tokens, but I think the intention of those clauses was to say that whitespace is not part of the tokens. I.e. if I receive key=" abc" I am allowed to send it further as just key="abc", I am not required to preserve whitespace. Unless we say that elsewhere, I would suggest not removing the clauses but rewording them.

Updated PTAL