Correct xenv.ini to make xenv installable from git

xenv/cli.py

@@ -102,7 +102,7 @@ def _parse_cmdline(argv):
     return args, cmd
 
 
-def _parse_config(filename='xenv.ini'):
+def _parse_config(filename='/etc/xenv.ini'):
     config = configparser.ConfigParser()
     config.read(filename)
     try: