Ivan Kozlovic ac0a1ee8fd Fixed compression http header request/response ...

The issue was introduced by PR #1858.

Key points:

- Sec-WebSocket-Extensions must contain approved headers, so moving
the "no-masking" private extension to its own header "Nats-No-Masking".

- The format of the permessage-deflate negotiation response became
invalid, I have fixed that.

- For leaf nodes, if `permessage-deflate` extension is not at all
present in the response, then simply disable compression, however
if it is present but there is no server/client no context take over,
then we have to fail the connection.

- A leafnode test was not setting the "NoMasking" option so the
test TestLeafNodeWSNoMaskingRejected was not capturing possible
error if negotiation failed.

Signed-off-by: Ivan Kozlovic <ivan@synadia.com>

2021-02-01 12:10:37 -07:00

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