Log message:
url2pkg: make code for analyzing CPAN URLs simpler

No functional change.

Log message:
url2pkg: add support for metacpan.org URLs

Log message:
url2pkg: for Python packages, prefix directory name with 'py-'

Log message:
url2pkg: allow url2pkg to be run from a category directory as well

Previously, it was necessary to create the package directory, change
into it and then run url2pkg from there.  Since the name of the package
directory usually corresponds to DISTNAME without the version number,
all necessary data is readily available, so automate this.

Update version to 21.4.2.

Log message:
url2pkg: only accept a single URL as command line argument

Log message:
url2pkg: extract code for analyzing the distfile URL

In a few commits, this will allow url2pkg to be run from a category
directory, thereby omitting the need to create the package directory
manually.

No functional change.

Log message:
url2pkg: add type annotation for usage

Log message:
url2pkg: improve MASTER_SITES and HOMEPAGE for PyPI packages

https://mail-index.netbsd.org/tech-pkg/2021/12/31/msg025908.html

Bump version.

Log message:
url2pkg: test current behavior for PyPI downloads

Log message:
url2pkg: remove interactivity

In the first phase, url2pkg generates a minimal package Makefile, barely
enough for downloading the distfile from the given URL.  That part runs
fully automated in almost all cases, so there is no need to invoke the
editor at this point.

After adjusting the package Makefile based on the downloaded and
extracted distfile, url2pkg has done its job, so there is no reason to
run the editor there as well.

Bump version.