genstats: rebuild

* genstats: Use URLs from Wayback Machine
  The website's gone, and the author indicated via email that the source is gone, too.

  Unfortunately, the sha256 hash that WM has is different, so it's not the exact same file.
  However, WM's capture in 2014 and 2015 are the same, and the version number is the same,
  so let's roll with it.

  300f3150fd is a precedent.
* genstats: Add license decl and skip livecheck
* genstats: Clean up archive.org URLs
* genstats: Use non-deprecated license identifier
* genstats: Fix whitespace error
* genstats: retain disabled state, but give a better reason
* genstats: Use GPL-2.0 for license for now
* genstats: Remove whitespace
* genstats: Drops livecheck since xml2 dropped it, too.
  xml2 dropped it in 2cfebaa790

  See also https://github.com/Homebrew/homebrew-core/pull/120501
* genstats: shorten disable message to satisfy checks

Closes #120021.

Co-authored-by: Sean Molenaar <SMillerDev@users.noreply.github.com>
Signed-off-by: Sean Molenaar <1484494+SMillerDev@users.noreply.github.com>
Signed-off-by: BrewTestBot <1589480+BrewTestBot@users.noreply.github.com>

Formula/genstats.rb

@@ -1,8 +1,9 @@
 class Genstats < Formula
   desc "Generate statistics about stdin or textfiles"
-  homepage "https://www.vanheusden.com/genstats/"
-  url "https://www.vanheusden.com/genstats/genstats-1.2.tgz"
-  sha256 "f0fb9f29750cdaa85dba648709110c0bc80988dd6a98dd18a53169473aaa6ad3"
+  homepage "https://web.archive.org/web/20180831170016/www.vanheusden.com/genstats/"
+  url "https://web.archive.org/web/20150331055106if_/vanheusden.com/genstats/genstats-1.2.tgz"
+  sha256 "9988264357211a24f7024db05e24ed88db58227a626330114309147eb7078f6e"
+  license "GPL-2.0"
 
   bottle do
     sha256 cellar: :any_skip_relocation, arm64_big_sur: "d60b585ddff616135b75457e8f51cc3d8b1cfc9a03fded05df23fde64a74cddb"
@@ -13,8 +14,7 @@ class Genstats < Formula
     sha256 cellar: :any_skip_relocation, sierra:        "051dbb7c4f653b615b606d1fce15df9336a086e38428fcfdb2aee9f0057d8990"
     sha256 cellar: :any_skip_relocation, el_capitan:    "44502f7a2dfcb1355336db69267d6363d6e8b8767b47628b0d3099743513ed5f"
   end
-
-  disable! date: "2022-07-31", because: "Upstream website has disappeared"
+  disable! date: "2022-07-31", because: "Upstream site gone; archive.org URLs provided for 'brew extract' usage"
 
   def install
     # Tried to make this a patch.  Applying the patch hunk would