[e2e] overlay over TCP

[Bob Braden]

  *> 
  *> Yes. They suffer from TCP's inability to do a true 'push'

Hey, it's not TCP's fault -- TCP has a true Push.  Generations of
implementors have chosen to invoke it implicitly rather than explicitly
from an application.  This choice makes a lot of sense, but it does provide
less functionality than TCP allows.

Bob Braden