config: allow configuration from environment variables

scripts/amodem

@@ -11,6 +11,9 @@ import logging
 format = '%(asctime)s %(levelname)-10s %(message)-100s %(filename)s:%(lineno)d'
 logging.basicConfig(level=logging.DEBUG, format=format)
 
+log = logging.getLogger('__name__')
+
+from amodem import config
 from amodem import recv
 from amodem import send
 from amodem import wave
@@ -97,6 +100,8 @@ def main():
     if getattr(args, 'plt', 'None'):
         import pylab
         args.plt = pylab
+
+    log.debug('MODEM settings: %r', config.settings)
     args.main(args)
 
 def run(args, process):