With this commit, the following tls options are supported and used if
present in the configuration file
- uri_out_cert_chain_file
- uri_out_private_key_file
- uri_out_verify_peer
- uri_out_fail_if_no_peer_cert
- uri_out_cipher_list
- uri_out_ecdh_curve
- uri_out_dhparam
- uri_out_ssl_version

- uri_in_cert_chain_file
- uri_in_private_key_file
- uri_in_verify_peer
- uri_in_fail_if_no_peer_cert
- uri_in_cipher_list
- uri_in_ecdh_curve
- uri_in_dhparam
- uri_in_ssl_version