settings update/addition

updated settings name (loglevel) to a more descriptive name (writelog)
added logfilters setting to allow user defined filters.

servatrice/servatrice.ini.example

@@ -5,7 +5,8 @@ logfile=server.log
 name="My Cockatrice server"
 id=1
 number_pools=1
-loglevel=0
+writelog=1
+logfilters=""
 
 [servernetwork]
 active=0