Revert "Remove support for pre-2006 public dist/bug pages"

The latest releases of at least 542 distributions point to some of these
old-school URLs in their META files [1].  There's also a lot of POD
pointing at them [2].  It's far too optimistic to remove these URLs
anytime in the future, even if the tools which may be using them as
defaults are updated [3].  First rule of the internet: don't break links!
So we're stuck with 'em.

This reverts commit 2630ea4bd54f9915c6185a9845ca234073ebd3c8.

[1] See __END__ below.  MetaCPAN is awesome.
[2] http://grep.cpan.me/?q=%5CQrt.cpan.org%2FNoAuth%5CE
[3] Including, but not limited to:

    • Module::Build
    • Dist::Zilla
    • ExtUtils::MakeMaker
    • Module::Install
    • Module::Build::Bundle

__END__
use strict;
use warnings;
use List::Util 'max';

use ElasticSearch;
my $es = ElasticSearch->new(
    servers     => 'api.metacpan.org',
    no_refresh  => 1,
    transport   => 'http',
);
my $scroller = $es->scrolled_search(
    query       => { match_all => {} },
    size        => 100,
    search_type => 'scan',
    scroll      => '5m',
    index       => 'v0',
    type        => 'release',
    fields  => [ "name" , "resources.bugtracker.web", "metadata.generated_by" ],
    filter  => {
        and => [
            { exists    => { field  => "resources.bugtracker.web" }},
            { term      => { status => "latest" }},
        ],
    },
) or die "Connecting to api.metacpan.org failed";

my %dist;
while ( my $result = $scroller->next ) {
    my ($name, $bugs) = @{$result->{fields}}{"name", "resources.bugtracker.web"};
    next unless $bugs =~ m{\Qrt.cpan.org/NoAuth\E}i;
    $dist{$name} = $bugs;
}

my $max_length = max map { length } keys %dist;

printf "%-*s %s\n", $max_length, $_, $dist{$_}
    for sort keys %dist;