WIP: SPF: Modifiers: to_bind9.

src/storage/zone.cr

@@ -312,6 +312,10 @@ class DNSManager::Storage::Zone
 			end
 
 			def to_s(io : IO)
+				to_bind9 io
+			end
+
+			def to_bind9(io : IO)
 				io << "#{t.to_s.downcase}=#{v}"
 			end
 		end