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>

test/test_modules.py

@@ -54,6 +54,7 @@ class LoggerStub:
     def debug(self, *args):
         print(*args)
     info = warning = exception = debug
+    handlers = []
 
 
 logger = LoggerStub()
@@ -65,7 +66,7 @@ class ServerStub:
 
 
 def test_Communicator():
-    o = Communicator('communicator', LoggerStub(), {'.description':''}, ServerStub({}))
+    o = Communicator('communicator', LoggerStub(), {'.description': ''}, ServerStub({}))
     o.earlyInit()
     o.initModule()
     event = MultiEvent()