Not particularly on topic, but: including a patch version number in your
subject headings is pretty unfriendly IMO, because it breaks threading
for people whose MUAs do threading by matching up subject lines.
I don't actually see the point of the [PATCH] annotation at all, because
the thread is soon going to contain lots of messages with the same subject
line but no embedded patch. Like this one. So it's just noise with no
information content worth noticing.
regards, tom lane