[ITP] wget2 - fast multithreaded file and recursive website downloader

[Brian Inglis <Brian.Inglis@SystematicSw.ab.ca>]

wget2 2.0.0 is the official stable release of the successor of wget
supplying a shared library API like curl to build a modern, fast,
multithreaded, file and recursive website downloader using HTTP2, HTTP
compression, parallel connections, and If-Modified-Since HTTP headers.
The library provides the basic functions needed by a modern web client.

It is a replacement only for the HTTP functions of the original wget,
as it does not support FTP or other protocols, and no longer supports
some of the options of its predecessor.

Release announcement:

https://lists.gnu.org/archive/html/info-gnu/2021-09/msg00011.html

More information is available from the home page:

	https://gitlab.com/gnuwget/wget2

Sources are available from:

	https://gitlab.com/gnuwget/wget2.git
	https://git.sv.gnu.org/git/wget/wget2.git

and browsable at GitLab or:

	https://git.sv.gnu.org/cgit/wget/wget2.git
	https://git.sv.gnu.org/gitweb/?p=wget/wget2.git

The package wget2 is currently offered on Arch, Debian/Ubuntu, Gentoo,
HP-UX, Kali, Msys2, OpenSuSE, PureOS, Raspbian, Slackware; see:

	https://repology.org/project/wget2

The Cygwin packages and sources:

	wget2
	libwget2_1
	libwget2-devel
	libwget2-debuginfo

are available on Google drive:

https://drive.google.com/drive/folders/1VVuC14KuB6uShm4FQL9BuXH0hpLYnIcJ

The CI scallywag build is against playground:

https://cygwin.com/cgi-bin2/jobs.cgi?id=3358&user=Brian+Inglis&srcpkg=playground&status=succeeded

with the Github Actions CI logs at:

	https://github.com/cygwin/scallywag/actions/runs/1280151343

I have worked with upstream to get the package config, build, and tests
to run successfully, and the necessary patches are either in the
upstream repo or likely to be committed soon, and included in the next
release of wget2.