Quickfix unexpected encrypted PEM format
Quickfix unexpected encrypted PEM format

This quickfix changes the PEM format from PKSC8 to
PKSC5 (TraditionalOpenSSL) in pyca_crypto's variant of
`create_rsa_encrypted_pem`.
PKSC5 has the PEM headers expected by other PEM parsing functions,
e.g. `is_pem_private` and `extract_pem`.

See secure-systems-lab/securesystemslib#54 for more details

secure-systems-lab/securesystemslib,secure-systems-lab/securesystemslib