This flag was added on March 3, 2008 to comply with a specific vendor's
hardware limitations. This vendor is out of business, and with the
assumption of a software datapath backup, it is unlikely that a switch
would be unable to support sending to a physical port and the controller
simultaneously.
This commmit removes the corresponding spec text and replaces the
capability bit with a reserved one.
Thanks to Justin Pettit for the history.
Brandon Heller
bb697af959