Announcing: port_upgrade

[Joshua Root]

Scott Haneda wrote:
> Why can't the wireshark port and similar ports have a
> "requires-depends-rebuild" defaulting to false. 
> 
> The port file could set it to true as needed. Some other "magic" could
> happen in the mac ports base to figure out if it needs special treatment. 

In this example, wireshark isn't the place to specify this information,
libpcap is. See the ticket I linked to in my previous message.

- Josh