Bug#945284: [python-x2go] throws an exception if log messages contain Umlauts

[Mike Gabriel <mike.gabriel@das-netzwerkteam.de>]

Package: python-x2go
Version: 0.6.0.2-1
Sevrity: important

When launching pyhoca-gui (which is still on Python2 and uses  
python-x2go underneath) with locale de_DE.UTF-8, some log messages are  
localized (those that are shown via desktop notifications).

If those log messages contain non-ASCII characters (e.g. Umlauts),  
then I see the below Python exception:

```
Traceback (most recent call last):
  File  
"/usr/lib/python2.7/dist-packages/pyhoca/wxgui/profilemanager.py",  
line 2498, in OnApplyButton
    icon='profile_save',
  File "/usr/lib/python2.7/dist-packages/pyhoca/wxgui/notify.py",  
line 138, in send
    self._pyhoca_logger('[%s] %s' %  
(title.encode(utils.get_encoding()),  
text.encode(utils.get_encoding())), loglevel=log.loglevel_NOTICE)
  File "/usr/lib/python2.7/dist-packages/x2go/log.py", line 102, in message
    msg = msg.encode(utils.get_encoding())
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position  
32: ordinal not in range(128)
```

The underlying flaw is in the python-x2go module.

This bug prohibits users to e.g. edit session profiles via the profile  
manager integrated in PyHoca-GUI.

This issue needs to be solve in Debian testing/unstable and Debian buster.

light+love
Mike Gabriel
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