added support for UDP devices, added buffer for network devices, added option for sending an initial symbol after opening a network device, added option for setting transfer latency and use default 10 ms for network device, set TCP_NODELAY for TCP device socket, flush potentially buffered input on network device when connecting

src/tools/ebusfeed.cpp

@@ -129,7 +129,7 @@ int main(int argc, char* argv[])
 	if (argp_parse(&argp, argc, argv, ARGP_IN_ORDER, NULL, &opt) != 0)
 		return EINVAL;
 
-	Device* device = Device::create(opt.device, false, NULL);
+	Device* device = Device::create(opt.device, false, false, NULL);
 	if (device == NULL) {
 		cout << "unable to create device " << opt.device << endl;
 		return EINVAL;