debugging: print ca certs loaded into default ctx

Lib/test/test_httplib.py

@@ -554,6 +554,9 @@ class HTTPSTest(TestCase):
     def test_networked_trusted_by_default_cert(self):
         # Default settings: requires a valid cert from a trusted CA
         test_support.requires('network')
+        if test_support.verbose:
+            import ssl
+            print(ssl._create_default_https_context().get_ca_certs())
         with test_support.transient_internet('www.python.org'):
             h = httplib.HTTPSConnection('www.python.org', 443)
             h.request('GET', '/')