removing stale ports [was: Re: make index failed]

[Mark Linimon]

> I can't build index after recent update of ports via portsnap:
>
> wait..astk-client-1.5.0.1_2: "/usr/ports/shells/bash2" non-existent -- 
> dependency list incomplete

As a reminder to committers, when removing stale ports, you also have to
check the _optional_ dependencies in port Makefiles (yes, this involves
a grep over the entire 17k+ Makefiles).  It's a complete PITA, but it's
necessary, but often overlooked.

I speak as one who has triggered this particular bomb before :-)

mcl