But with with older releases I don't messing with people
configuration
files since I would not want to break an existing configuration...
Still never suggested that.
Note, there is a number of people who are currently running with
correctly configured v4 server... I would hate to mess those people up..
Of course. So push an F-11 update where whatever configuration never
mentions v4 and doesn't work for v4, doesn't advertise v4.