a no-homepage homepage for ports with dead homepages

[Ken Cunningham]

On 2018-01-12, at 2:12 AM, Rainer Müller wrote:
> 
> Nit pick: I would have called it NoHomepage (small letter p), as the
> compound form seems to be more common than two words and it is used this
> way as Portfile option and in the wiki page itself.


Done. I always seem to want to CamelCase syllables. 


Last thing is master_sites.... assuming we want to keep the port, but if upstream is gone and we have the distfiles mirrored,

leave master_sites pointing nowhere, or make it 

https://distfiles.macports.org/portname



or is that some kind of circular nightmare?