map download link to distname

[Jonathan Stickel]

On 4/5/21 17:39, Ryan Schmidt wrote:
> master_siteshttps://gitlab.com/graphviz/graphviz/-/package_files/${package_id}/download?dummy=

Thank you, this is the piece that I was missing. I was not familiar with 
URL query strings. Maybe this is something useful to include in

https://trac.macports.org/wiki/CommittersTipsAndTricks

? I can add something to the page and submit for review.