Trying to fix #8108. Will watch the buildbot(s).

Lib/test/test_ftplib.py

@@ -315,11 +315,20 @@ if ssl is not None:
             raise
 
         def close(self):
+            ssl_want_read_or_write = False
             try:
                 if isinstance(self.socket, ssl.SSLSocket):
                     if self.socket._sslobj is not None:
+                        try:
                             self.socket.unwrap()
+                        except ssl.SSLError, err:
+                            if err.args[0] in (ssl.SSL_ERROR_WANT_READ,
+                                               ssl.SSL_ERROR_WANT_WRITE):
+                                ssl_want_read_or_write = True
+                            else:
+                                raise
             finally:
+                if not ssl_want_read_or_write:
                     super(SSLConnection, self).close()