Preserve hop-by-hop when setting close or keep-alive - #4196
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0x676e67
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Sep 13, 2026
seanmonstar
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Sep 15, 2026
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Fixes #4195.
This adjusts #4110 to use
appendinstead ofinsertwhen a nonzero number of "connection" headers are already present, and only if none of the existing headers already include the value being added.