Issue2616

Jython 2.7.1 added constants in the ssl module for supporting CRLs (VERIFY_CRL_CHECK_LEAF, VERIFY_CRL_CHECK_CHAIN, etc.). _ssl_certs.py doesn't actually support CRL files. It expects PEM files to start with a line like:

'-----BEGIN CERTIFICATE-----'

But CRLs begin with:

-----BEGIN X509 CRL-----

The traceback looks like this:

    ctx.load_verify_locations(crlfile)
  File "/opt/python/jython2.7/Lib/ssl.py", line 1169, in load_verify_locations
    _certs, private_key = _extract_certs_for_paths(cafiles)
  File "/opt/python/jython2.7/Lib/_sslcerts.py", line 218, in _extract_certs_for_paths
    _certs, _private_key = _extract_cert_from_data(f, password, key_converter, cert_converter)
  File "/opt/python/jython2.7/Lib/_sslcerts.py", line 237, in _extract_cert_from_data
    certs, private_key = _read_pem_cert_from_data(f, password, key_converter, cert_converter)
  File "/opt/python/jython2.7/Lib/_sslcerts.py", line 253, in _read_pem_cert_from_data
    for br in _extract_readers(f):
  File "/opt/python/jython2.7/Lib/_sslcerts.py", line 102, in _extract_readers
    raise SSLError(SSL_ERROR_SSL, "PEM lib (no start line or not enough data)")
SSLError: [Errno 1] PEM lib (no start line or not enough data)