Several small changes (#582)

    + logrotate from my raspberry pi
    added influx message format description
    added example configurations to debian package

README.InfluxDB.md

@@ -13,3 +13,15 @@ Set `"api"` to`"influxdb"` to use the InfluxDB API.
 
 For optional parameters such as `username` or `password` have a look at the
 example config file is available at [`etc/vzlogger.conf.InfluxDB`](https://github.com/volkszaehler/vzlogger/blob/master/etc/vzlogger.conf.InfluxDB)
+
+Message Format
+---------------------------
+
+Messages are sent in the following format:
+
+<measurement_name>,uuid=<uuid>,<tags> value=<value> <time[ms]>
+
+In the above, measurement_name, tags and uuid are from the configuration
+while value and time[ms] are value and time of the measurement.
+
+Details about this can be found in the [InfluxDB line protocol tutorial](https://docs.influxdata.com/influxdb/v1.8/write_protocols/line_protocol_tutorial/)

debian/vzlogger.examples

@@ -0,0 +1,4 @@
+etc/vzlogger.conf.InfluxDB
+etc/vzlogger.conf.meterOCR
+etc/vzlogger.conf.meterOMS
+etc/vzlogger.conf.mySmartGrid

debian/vzlogger.install

@@ -1 +1,2 @@
 etc/vzlogger.conf etc
+etc/logrotate.d/vzlogger etc/logrotate.d

etc/logrotate.d/vzlogger

@@ -0,0 +1,8 @@
+/var/log/vzlogger.log {
+        rotate 1
+        size=100k
+        copytruncate
+        missingok
+        notifempty
+	create 0664 vzlogger root
+}