Checkmk Werk 13115: Fix UnicodeDecodeError on fallback notifications

ID: 13115 Title: Fix UnicodeDecodeError on fallback notifications Component: Notifications Level: 1 Class: Bug fix Version: 2.1.0i1 If locales with non UTF-8 characters were used, fallback notifications could fail with an error like "UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe5 in position 1079: invalid continuation byte". This was seen on RHEL based systems.