Knot::Protocol: Fix iteration.

lib/knot/protocol.rb

@@ -164,9 +164,9 @@ class Knot::Protocol
 		sock = StringIO.new s
 		sock.write [1].pack( 'c')
 		data[:flags] ||= ''
-		Idx::Idx.each_with_index do |n, i|
-			v = data[n]&.to_s
-			sock.write [0x10+i, v.size, v].pack( 'c na*')  if v
+		Idx::Idx.each do |n|
+			v = data[n.to_sym]&.to_s&.b
+			sock.write [n.to_i, v.size, v].pack( 'c na*')  if v
 		end
 		sock.write [3].pack( 'c')
 		sock.flush