Add a test to verify that expired.badssl.com's chain of trust is expired.

t/51_badssl.com.t

@@ -22,6 +22,7 @@ cmp_ok(@$okjson,'>',10,"We have more then 10 findings"); $tests++;
 # Expiration
 pass("Running testssl against expired.badssl.com"); $tests++;
 $out = `./testssl.sh -S --jsonfile tmp.json --color 0 expired.badssl.com`;
+like($out, qr/Chain of trust\s+NOT ok \(expired\)/,"The chain of trust should be expired"); $tests++;
 like($out, qr/Certificate Validity \(UTC\)\s+expired/,"The certificate should be expired"); $tests++;
 $json = json('tmp.json');
 unlink 'tmp.json';