New review comment by paper42 on void-packages repository

https://github.com/void-linux/void-packages/pull/32419#discussion_r686304994

Comment:
* it doesn't usually save any characters
* if $pkgname changes for some reason (like libhandy and libhandy1 which is 1 library in different versions), we might want to keep the same distfiles URL

and probably more reasons I don't remember now