Werk #8448: Fixed handling of vanished but still active recurring downtimes.

Component	The Checkmk Micro Core
Title	Fixed handling of vanished but still active recurring downtimes.
Date	Apr 22, 2016
Level	Prominent Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0i1 Checkmk Enterprise (CEE), Checkmk MSP (CME)

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