Anders Gustafsson remarked that requiring CURLOPT_HTTP_VERSION set to 1.0

when CURLOPT_HTTP200ALIASES is used to avoid the problem mentioned below is
not very nice if the client wants to be able to use _either_ a HTTP 1.1
server or one within the aliases list... so starting now, libcurl will
simply consider 200-alias matches the to be HTTP 1.0 compliant.

lib/transfer.c

@@ -766,8 +766,7 @@ CURLcode Curl_readwrite(struct connectdata *conn,
                   if (checkhttpprefix(data, k->p)) {
                     nc = 1;
                     k->httpcode = 200;
-                    k->httpversion =
-                      (data->set.httpversion==CURL_HTTP_VERSION_1_0)? 10 : 11;
+                    k->httpversion = 10;
                   }
                 }
               }