https flag is not mirrored from Url() to BaseUrl

this flag assignement was removed in:
  #111

I don't know if it was removed intentional, but without it
the BaseUrl.https flag only reflects the state of how BaseUrl was
constructed with.

src/request.cc

@@ -162,6 +162,7 @@ BaseUrl::BaseUrl(std::string host, bool https, std::string region)
     return;
   }
 
+  this->https = url.https;
   this->host = url.host;
   this->port = url.port;