fix iobber chunker: read comma-separated chan list

iobber/chunker.py

@@ -29,7 +29,7 @@ from operator import itemgetter as ig
 import corpio, config, classify
 
 def get_channels(conf):
-	return conf.get(config.S_GLOBAL, config.O_CHANNELS).split()
+	return conf.get(config.S_GLOBAL, config.O_CHANNELS).split(',')
 
 def is_input_tagged(conf):
 	return conf.getboolean(config.S_GLOBAL, config.O_TAGGED)