Werk #15891: ical_import: .ical files are now imported using the icalendar package

Component	Setup
Title	ical_import: .ical files are now imported using the icalendar package
Date	Jun 16, 2023
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.3.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.2.0p8 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME)

When importing .ical files, the icalendar package is now responsible for parsing the contents.

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