RFC2068
Hypertext Transfer Protocol -- HTTP/1.1
Only Link header
RFC2617
HTTP Authentication: Basic and Digest Access Authentication
RFC3986
Uniform Resource Identifier (URI): Generic Syntax
RFC5322
Internet Message Format
FROM header mailbox specification only.
RFC5646
Tags for Identifying Languages
RFC5789
PATCH Method for HTTP
RFC5987
Character Set and Language Encoding for Hypertext Transfer Protocol (HTTP) Header Field Parameters
RFC6265
HTTP State Management Mechanism
Anomalization only
RFC6266
Use of the Content-Disposition Header Field in the Hypertext Transfer Protocol (HTTP)
Anomalization only
RFC6797
HTTP Strict Transport Security (HSTS)
Anomalization only
RFC6874
Representing IPv6 Zone Identifiers in Address Literals and Uniform Resource Identifiers
RFC7230
Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing
RFC7231
Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content
RFC7232
Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests
RFC7233
Hypertext Transfer Protocol (HTTP/1.1): Caching
RFC7234
Hypertext Transfer Protocol (HTTP/1.1): Range Requests
RFC7235
Hypertext Transfer Protocol (HTTP/1.1): Authentication
RFC7540
Hypertext Transfer Protocol Version 2 (HTTP/22)
RFC7541
HPACK: Header Compression for HTTP/2
An HTTP/2 Extension for Bidirectional Message Communication
draft-xie-bidirectional-messaging-02