Now "myProxyHTTPSConnection" inherits from "M2Crypto.httpslib.ProxyHTTPSConnection" _and_ "httplib.HTTPSConnection".
The latter class is only used to call "httplib.HTTPSConnection.endheaders". This multiple inheritance shouldn't have any side-effects
because "M2Crypto.httpslib.ProxyHTTPSConnection" already inherits from "httplib.HTTPSConnection" (and mro will pick the methods from
"M2Crypto.httpslib.ProxyHTTPSConnection" first).