Improve readability of logged email messages

issue3542
review8751002

trytond/__init__.py

@@ -2,6 +2,7 @@
 #this repository contains the full copyright notices and license terms.
 import os
 import time
+from email import Charset
 
 from . import server
 
@@ -10,3 +11,6 @@ __all__ = ['server']
 os.environ['TZ'] = 'UTC'
 if hasattr(time, 'tzset'):
     time.tzset()
+
+# set email encoding for utf-8 to 'quoted-printable'
+Charset.add_charset('utf-8', Charset.QP, Charset.QP)