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

- 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.