syslog: strip empty trailing newlines

for unknown reasons, syslog messages are getting generating with
newlines in the end. we then try to parse this empty string as a
syslog message and fail

syslog.js

@@ -53,7 +53,7 @@ async function start() {
 
     gServer.on('connection', function (socket) {
         socket.on('data', function (data) {
-            const msg = data.toString('utf8');
+            const msg = data.toString('utf8').trim(); // strip any trailing empty new lines
             for (const line of msg.split('\n')) { // empirically, multiple messages can arrive in a single packet
                 const info = parseRFC5424Message(line);
                 if (!info) return debug('Unable to parse:', msg);