fix problem with umlaut in date string when pre-decoding the log message

only works for German months!
better way to fix the problem with umlaut in date string when pre-decoding the log message

still only works for German months!
Merge branch 'master' into fix-umlaute
Merge pull request #92 from ChristianBeer/fix-umlaute

fix problem with umlaut in date string when pre-decoding the log message