Add sample http dissector code using new features
Add sample http dissector code using new features

This new http code uses the state machine and the grammar to provide a
sample of a protocol description using the new features.

nabilbendafi/haka,haka-security/haka,nabilbendafi/haka,lcheylus/haka,haka-security/haka,Wingless-Archangel/haka,LubyRuffy/haka,Wingless-Archangel/haka,nabilbendafi/haka,lcheylus/haka,lcheylus/haka,LubyRuffy/haka,haka-security/haka