Update libunbound to 1.9.4 (#3560)

Will need rebuilt twice; once now and once with OpenSSL update

*sigh*

Link to about instead of download

packages/libunbound.rb

@@ -2,22 +2,14 @@ require 'package'
 
 class Libunbound < Package
   description 'Unbound is a validating, recursive, and caching DNS resolver.'
-  homepage 'https://www.unbound.net/'
-  version '1.8.0'
-  source_url 'https://www.unbound.net/downloads/unbound-1.8.0.tar.gz'
-  source_sha256 '78f79d6d3b643fdcd74a14fc76542250da886c82f82bc55b51e189663d61b83f'
+  homepage 'https://nlnetlabs.nl/projects/unbound/about/'
+  version '1.9.4'
+  source_url 'https://nlnetlabs.nl/downloads/unbound/unbound-1.9.4.tar.gz'
+  source_sha256 '3d3e25fb224025f0e732c7970e5676f53fd1764c16d6a01be073a13e42954bb0'
 
   binary_url ({
-    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/libunbound-1.8.0-chromeos-armv7l.tar.xz',
-     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/libunbound-1.8.0-chromeos-armv7l.tar.xz',
-       i686: 'https://dl.bintray.com/chromebrew/chromebrew/libunbound-1.8.0-chromeos-i686.tar.xz',
-     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/libunbound-1.8.0-chromeos-x86_64.tar.xz',
   })
   binary_sha256 ({
-    aarch64: 'be4733b2311bad10f4dac8f3032b525fade63c4829c5e4f474f93e7411f54df6',
-     armv7l: 'be4733b2311bad10f4dac8f3032b525fade63c4829c5e4f474f93e7411f54df6',
-       i686: 'a0652536ce6348433d476d06993f942df1b0c103f5bcdfef8eb70b1d07c87362',
-     x86_64: '8668a925a7f46f477106661f561a2f6085cf23e389e26f86a23a46c0db064f12',
   })
 
   def self.build
@@ -27,10 +19,6 @@ class Libunbound < Package
            '--enable-shared',
            '--disable-static',
            '--with-pic'
-
-    # flex 2.6.3 requires -P option to rename yylex and other funcions
-    system "sed", "-i", "Makefile", "-e", '/$(LEX) -t $(srcdir)\/util\/configlexer.lex/s:-t:-t -Pub_c_:'
-
     system 'make'
   end