remove obsolete bot_user check; decrease debug logging

plugins.py

@@ -471,10 +471,6 @@ def data_parse_commands(msg):
 	if 2 > len(words): # need at least two words
 		return None
 
-	# don't reply if beginning of the text matches bot_user
-	if not words[1].startswith(conf('bot_user')):
-		return None
-
 	if 'hangup' in data:
 		logger('warn', 'received hangup: ' + data)
 		sys.exit(1)