stream-ssl: Fix memory leak in error scenario

ssl_new_stream() takes ownership of the passed-in 'name' parameter.
In error scenarios, the name is leaked. I was able to trigger this
leak by attempting to connect to an ovsdb over SSL and specifying
non-existent certificate, private key, and CA cert files.

This patch fixes the problem by freeing 'name' in the error label.

Signed-off-by: Mark Michelson <mmichels@redhat.com>
Signed-off-by: Russell Bryant <russell@ovn.org>

lib/stream-ssl.c

@@ -300,6 +300,7 @@ error:
         SSL_free(ssl);
     }
     closesocket(fd);
+    free(name);
     return retval;
 }