enhance logging

- bin/secop-server options -v and -q applied to console logger only
- level for logfile taken from general config
- option for automatic deletion of old logfiles
- added 'comlog' level (between debug and info)

This allows to run the servers by default with 'comlog' level on
the logfiles, which helps a lot for analyzing very rare communication
errors in retrospect.

to avoid spamming of the normal log files, comlog data is stored
separately, one file per communicator

+ redesign of remote logging (no more need of LoggerAdapter)

Change-Id: Ie156a202b1e7304e50bbe830901bc75872f6ffe2
Reviewed-on: https://forge.frm2.tum.de/review/c/sine2020/secop/playground/+/27427
Tested-by: Jenkins Automated Tests <pedersen+jenkins@frm2.tum.de>
Reviewed-by: Markus Zolliker <markus.zolliker@psi.ch>

secop_psi/ppms.py

@@ -100,8 +100,9 @@ class Main(Communicator):
     def communicate(self, command):
         """GPIB command"""
         with self.lock:
+            self.comLog('> %s' % command)
             reply = self._ppms_device.send(command)
-            self.log.debug("%s|%s", command, reply)
+            self.comLog("< %s", reply)
             return reply
 
     def read_data(self):