Package branch freshness

[Martin Pool]

It would be good to get that rmadison into lptools or ubuntu-dev-tools
- even a moderately hacky state would be useful.

In general any feature that might conceivably have bad consequences or
not be what people want probably ought to be behind a configuration
option, and I think this is in that class.

Please file a bug against lp saying this api call is slow enough to be
a problem.

I doubt API calls are being cached (even anonymously) but perhaps they are.

(Perhaps eventually we want a persistent on-disk ssl session cache
which could make later calls faster, but that's probably pretty far
down the list.)

Martin