Protect against server hijacking error handling #7811
Merged
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If a server returns "HTTP/1.x -8 OK", for example, it can misguide an application developer into freeing less-important memory so the request can be retried and succeed, when the problem is in the server.
_returnCode is never used anywhere else, but it could still contain a negative value returned by a broken server and therefore could cause troubles in the future (if _returnCode is in fact used)