Don't die if status FIFO exists

src/main.cpp

@@ -318,7 +318,7 @@ void onReady()
 bool createFifo(std::string path)
 {
 	auto result = mkfifo(path.c_str(), 0666);
-	if (result == 0) {
+	if ((result == 0) || (errno == EEXIST)) {
 		auto fd = open(path.c_str(), O_CLOEXEC | O_NONBLOCK | O_RDONLY);
 		if (fd < 0) {
 			diesys("open status fifo reader");