Added Protocol conformance section to README

Author: ok2c

README.md

@@ -47,6 +47,22 @@ Other dependencies are optional.
 
 (for detailed information on external dependencies please see [pom.xml](./pom.xml))
 
+Protocol conformance
+--------------------
+
+- [RFC 9110](https://datatracker.ietf.org/doc/html/rfc9110) - HTTP Semantics
+- [RFC 9111](https://datatracker.ietf.org/doc/html/rfc9111) - HTTP Caching
+- [RFC 9112](https://datatracker.ietf.org/doc/html/rfc9112) - Hypertext Transfer Protocol Version 1.1 (HTTP/1.1)
+- [RFC 7540](https://datatracker.ietf.org/doc/html/rfc7540) - Hypertext Transfer Protocol Version 2 (HTTP/2)
+- [RFC 7541](https://datatracker.ietf.org/doc/html/rfc7541) - HPACK: Header Compression for HTTP/2
+- [RFC 1945](https://datatracker.ietf.org/doc/html/rfc1945) - Hypertext Transfer Protocol -- HTTP/1.0
+- [RFC 3986](https://datatracker.ietf.org/doc/html/rfc3986) - Uniform Resource Identifier (URI): Generic Syntax
+- [RFC 6265](https://datatracker.ietf.org/doc/html/rfc6265) - HTTP State Management Mechanism (Cookies)
+- [RFC 7616](https://datatracker.ietf.org/doc/html/rfc7616) - HTTP Digest Access Authentication
+- [RFC 7617](https://datatracker.ietf.org/doc/html/rfc7617) - HTTP 'Basic' Authentication Scheme
+- [RFC 5861](https://datatracker.ietf.org/doc/html/rfc5861) - HTTP Cache-Control Extensions for Stale Content
+- [RFC 2817](https://datatracker.ietf.org/doc/html/rfc2817) - Upgrading to TLS Within HTTP/1.1
+
 Licensing
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