OpenKool R48 (48.0.1)

Runtime environment

• PHP: 7.2, 7.3, 7.4
• MySQL: 5.7

🚀 Improvements

• PHP errors are now logged to stderr instead of appearing in the HTML document
• Increased frequency of scheduler cron job
• Enable non-ASCII sender names by using MIME encoded words

🐛 Bugfixes

• Fix duty roster AJAX calls
• Avoid duplicate Reply-To header fields in mails