agent: avoid double SSL_free(), SSL_shutdown() only when needed

agent/agent.c

@@ -83,7 +83,8 @@ static void signal_handler(int sig)
 static void agent_shutdown(void)
 {
 	printf("Shutting down agent...\n");
-	if (ssl) SSL_shutdown(ssl);
+	if (ssl && !SSL_get_shutdown(ssl))
+		SSL_shutdown(ssl);
 	if (ssl) SSL_free(ssl);
 	if (ctx) SSL_CTX_free(ctx);	/* release context */
 	close(server);			/* close socket */
@@ -283,9 +284,6 @@ int main(int count, char *strings[])
 						memcpy(&args[index].buf, &buf, sizeof(struct msg_t));
 				}
 			}
-
-			SSL_shutdown(ssl);
-			SSL_free(ssl);		/* release connection state */
 		} while (bytes);
 		if (SSL_get_shutdown(ssl)) {
 			printf("RMPS server has shutdown, trying to reconnect...\n");