I'm closing this thread. Everyone has made their point. Time to move on. People who continue this thread will be removed.
Meanwhile, I'm spending a day to add an option to the postconf(1) command to display the contents of master.cf in canonicalized form, similar to the way that postconf(1) already displays the content of main.cf. This is also an opportunity to add support for the invisible main.cf parameters whose names are derived from master.cf services (delivery agents, spawn(8) services). Wietse