Prettier formatting: <a href="http://tools.ietf.org/html/rfc6265" rel="nofollow">http://tools.ietf.org/html/rfc6265</a><p>There's no Changes section but these sentences can be considered a summary:<p>- "This document specifies the syntax and semantics of these headers as they are actually used on the Internet. In particular, this document does not create new syntax or semantics beyond those in use today."<p>- "In particular, in moving RFC 2965 to Historic and obsoleting it, this document deprecates the use of the Cookie2 and Set-Cookie2 header fields."