Print SSLCertVerificationError if we get one

This also adds an option --verbose, but it doesn't actually do anything.
The error is alway reported.

clients/report_tlscert

@@ -11,6 +11,7 @@ import time
 import requests
 
 ap = argparse.ArgumentParser()
+ap.add_argument("--verbose", action="store_true")
 ap.add_argument("hostname")
 ap.add_argument("port", type=int, default=443, nargs="?")
 args = ap.parse_args()
@@ -28,7 +29,8 @@ with socket.create_connection((args.hostname, args.port)) as sock:
             cert = ssock.getpeercert()
             not_after = ssl.cert_time_to_seconds(cert["notAfter"])
             delta = not_after - now
-    except ssl.SSLCertVerificationError:
+    except ssl.SSLCertVerificationError as e:
+        print("got error %s; setting delta to 0", e)
         delta = 0
     report0.append({ "measure": "tls_cert_ttl", "unit": "s", "value": delta })