1. ENHANCED: Added wrapper '##'//[3-8] HTTP ABNF list extension with exactly a given number of productions.
2. ADDED: Headers connection, host, te, trailer, upgrade, via.
3. CLEANUP: Separate module for URI productions used in HTTP.
4. ADDED: New module for 4 target URI specification strategies in HTTP.
5. CLEANUP: Separate module for chunked message production in HTTP.
6. ADDED: Protocol productions in HTTP.