issue-181 HTTP response code 412 not handled

Author: mahtin

CloudFlare/cloudflare.py

@@ -333,7 +333,7 @@ def _call_network(self, method, headers, parts, identifiers, params, data_str, d
                     self.logger.debug('Response: 429 Header Retry-After: %s', retry_after)
 
             # if (response_code >= 400 and response_code <= 499) or response_code == 500:
-            if response_code in [400,401,403,404,405,500]:
+            if response_code in [400,401,403,404,405,412,500]:
                 # The /certificates API call insists on a 500 error return and yet has valid error data
                 # Other API calls can return 400 or 4xx with valid response data
                 # lets check and convert if able