class Protocol::HTTP::Headers::Merged

@parameter value [String] The header value.
@parameter key [String] The header key (lower case).
@yields {|key, value| ...} The header key and value.

Enumerate all headers in the merged list.

def each(&block)
	return to_enum unless block_given?
	
	@all.each do |headers|
		headers.each do |key, value|
			yield key.to_s.downcase, value.to_s
		end
	end
end