fix(worker): match only real s-maxage and max-age Cache-Control directives - #5785
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Vendor prefixes like x-s-maxage were substring-matched as s-maxage because the Cache-Control parser had no token boundary. Anchor both directives so only standalone tokens set the cache TTL.
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/s-maxage=and/max-age=treated vendor extensions likex-s-maxageas the standard directive, soCache-Control: x-s-maxage=3600, max-age=1800becamepublic, max-age=3600.Match only real tokens (start or after
,;/ whitespace).x-s-maxageno longer wins overmax-age.Fixes #5780