Add logging for Audio MODEM plugin

plugins/audio_modem.py

@@ -10,10 +10,13 @@ import traceback
 import zlib
 import json
 from io import BytesIO
+import sys
 
 try:
     import amodem
     print_msg('Audio MODEM is enabled.')
+    amodem.log.addHandler(amodem.logging.StreamHandler(sys.stderr))
+    amodem.log.setLevel(amodem.logging.INFO)
 except ImportError:
     amodem = None
     print_msg('Audio MODEM is not found.')