Write a version header on faup1090 startup

faup1090.c

@@ -204,6 +204,7 @@ int main(int argc, char **argv) {
     // Set up output connection on stdout
     fatsv_output = makeFatsvOutputService();
     createGenericClient(fatsv_output, STDOUT_FILENO);
+    writeFATSVHeader();
 
     // Run it until we've lost either connection
     while (!Modes.exit && beast_input->connections && fatsv_output->connections) {