Generates an adhoc SSL context for the development server.

def generate_adhoc_ssl_context():
    """Generates an adhoc SSL context for the development server."""
    crypto = _get_openssl_crypto_module()
    import tempfile
    import atexit

    cert, pkey = generate_adhoc_ssl_pair()
    cert_handle, cert_file = tempfile.mkstemp()
    pkey_handle, pkey_file = tempfile.mkstemp()
    atexit.register(os.remove, pkey_file)
    atexit.register(os.remove, cert_file)

    os.write(cert_handle, crypto.dump_certificate(crypto.FILETYPE_PEM, cert))
    os.write(pkey_handle, crypto.dump_privatekey(crypto.FILETYPE_PEM, pkey))
    os.close(cert_handle)
    os.close(pkey_handle)
    ctx = load_ssl_context(cert_file, pkey_file)
    return ctx