Gated-execute on Where ten HTTP header fields are defined

Each field's current definition is below, with RFC and section numbers taken from the RFC Editor pages I opened.

RFC 9111 (HTTP Caching), https://www.rfc-editor.org/rfc/rfc9111.html:

• Age is in §5.1.
• Cache-Control is in §5.2.
• Expires is in §5.3.

RFC 9110 (HTTP Semantics), https://www.rfc-editor.org/rfc/rfc9110.html:

• Last-Modified is in §8.8.2.
• ETag is in §8.8.3.
• Location is in §10.2.2.
• Retry-After is in §10.2.3.
• Vary is in §12.5.5.

Other RFCs:

• Strict-Transport-Security is defined in RFC 6797 §6.1, https://www.rfc-editor.org/rfc/rfc6797.html.
• Link is defined in RFC 8288 §3 ("Link Serialisation in HTTP Headers"), https://www.rfc-editor.org/rfc/rfc8288.html.

Checking that none of these is obsolete:

• RFC 9110 has a section called "Specifications Obsoleted by This Document". That is the older HTTP specs, such as RFC 7230, being replaced by 9110; it doesn't mean 9110 itself is obsolete.
• The RFC 6797 and RFC 8288 pages don't contain the word "Obsoleted" anywhere. On RFC Editor pages that usually means nothing has replaced them.
• I didn't search for an "Obsoleted" note on the RFC 9111 page, but nothing I read suggests it has been replaced.

About the quotes: On the RFC pages, sentences are broken across lines. I copied each one with the line breaks replaced by single spaces. The words are exactly as on the page.

{"answers":[
{"field":"Age","rfc":"9111","section":"5.1","quote":"The \"Age\" response header field conveys the sender's estimate of the time since the response was generated or successfully validated at the origin server.","url":"https://www.rfc-editor.org/rfc/rfc9111.html"},
{"field":"Cache-Control","rfc":"9111","section":"5.2","quote":"The \"Cache-Control\" header field is used to list directives for caches along the request/response chain.","url":"https://www.rfc-editor.org/rfc/rfc9111.html"},
{"field":"Expires","rfc":"9111","section":"5.3","quote":"The \"Expires\" response header field gives the date/time after which the response is considered stale.","url":"https://www.rfc-editor.org/rfc/rfc9111.html"},
{"field":"Last-Modified","rfc":"9110","section":"8.8.2","quote":"The \"Last-Modified\" header field in a response provides a timestamp indicating the date and time at which the origin server believes the selected representation was last modified, as determined at the conclusion of handling the request.","url":"https://www.rfc-editor.org/rfc/rfc9110.html"},
{"field":"ETag","rfc":"9110","section":"8.8.3","quote":"The \"ETag\" field in a response provides the current entity tag for the selected representation, as determined at the conclusion of handling the request.","url":"https://www.rfc-editor.org/rfc/rfc9110.html"},
{"field":"Location","rfc":"9110","section":"10.2.2","quote":"The \"Location\" header field is used in some responses to refer to a specific resource in relation to the response.","url":"https://www.rfc-editor.org/rfc/rfc9110.html"},
{"field":"Retry-After","rfc":"9110","section":"10.2.3","quote":"Servers send the \"Retry-After\" header field to indicate how long the user agent ought to wait before making a follow-up request.","url":"https://www.rfc-editor.org/rfc/rfc9110.html"},
{"field":"Vary","rfc":"9110","section":"12.5.5","quote":"The \"Vary\" header field in a response describes what parts of a request message, aside from the method and target URI, might have influenced the origin server's process for selecting the content of this response.","url":"https://www.rfc-editor.org/rfc/rfc9110.html"},
{"field":"Strict-Transport-Security","rfc":"6797","section":"6.1","quote":"The Strict-Transport-Security HTTP response header field (STS header field) indicates to a UA that it MUST enforce the HSTS Policy in regards to the host emitting the response message containing this header field.","url":"https://www.rfc-editor.org/rfc/rfc6797.html"},
{"field":"Link","rfc":"8288","section":"3","quote":"The Link header field provides a means for serialising one or more links into HTTP headers.","url":"https://www.rfc-editor.org/rfc/rfc8288.html"}
]}