Legacy browsers would connect to the http port and send the url as given;
fhttp aware browsers would try connecting to the fhttp port first. This
would give full backward compatibility, and would also give a strong incentive
for people to upgrade. If Super-Muzak from Muzak Communications
works ten times faster than Square-Muzak from Sprout, the folks at Sprout are
going to have a big incentive to get the faster protocol into their next
release...
Simon