ftp: clear the do_more bit when the server has connected

The multi state machine would otherwise go into the DO_MORE state after
DO, even for the case when the FTP state machine had already performed
those duties, which caused libcurl to get stuck in that state and fail
miserably. This occured for for active ftp uploads.

Reported-by: Patricia Muscalu

lib/ftp.c

@@ -340,6 +340,9 @@ static CURLcode AcceptServerConnect(struct connectdata *conn)
     return CURLE_FTP_PORT_FAILED;
   }
   infof(data, "Connection accepted from server\n");
+  /* when this happens within the DO state it is important that we mark us as
+     not needing DO_MORE anymore */
+  conn->bits.do_more = FALSE;
 
   conn->sock[SECONDARYSOCKET] = s;
   (void)curlx_nonblock(s, TRUE); /* enable non-blocking */