- Christopher Palow fixed a curl_multi_socket() issue which previous caused

libcurl to not tell the app properly when a socket was closed (when the name
  resolve done by c-ares is done) and then immediately re-created and put to
  use again (for the actual connection). Since the closure will make the
  "watch status" get lost in several event-based systems libcurl will need to
  tell the app about this close/re-create case.

lib/multi.c

@@ -965,6 +965,11 @@ static CURLMcode multi_runsingle(struct Curl_multi *multi,
       easy->result = Curl_is_resolved(easy->easy_conn, &dns);
 
       if(dns) {
+        /* Update sockets here. Mainly because the socket(s) may have been
+           closed and the application thus needs to be told, even if it is
+           likely that the same socket(s) will again be used further down. */
+        singlesocket(multi, easy);
+
         /* Perform the next step in the connection phase, and then move on
            to the WAITCONNECT state */
         easy->result = Curl_async_resolved(easy->easy_conn,