The %<cqpv> log tag now always shows http/1.1

As of commitaf76977adb9f3c0296a2 (TS-3612) , the %<cqpv> log now always shows http/1.1. Whereas before, it would show http/2 if the session negotiated H2. Assuming this isn't intentional (cause if it is, it should be moved out to 7.0.0), this is is a blocker for 6.2.0 release IMO.