chore: import upstream snapshot with attribution

acl/cert_output.cgi

@@ -0,0 +1,19 @@
+#!/usr/local/bin/perl
+# cert_issue.cgi
+
+use strict;
+use warnings;
+no warnings 'redefine';
+no warnings 'uninitialized';
+require './acl-lib.pl';    ## no critic
+our (%in, %text, %config, %access);
+
+&ReadParse();
+my $tempdir = &tempname();
+$tempdir =~ s/\/[^\/]+$//;
+&is_under_directory($tempdir, $in{'file'}) ||
+	&error($text{'cert_etempdir'});
+print "Content-type: application/x-x509-user-cert\n\n";
+print &read_file_contents($in{'file'});
+&unlink_file($in{'file'});
+