Werk #13069: Fix file path manipulation

Component	Setup
Title	Fix file path manipulation
Date	Aug 27, 2021
Level	Trivial Change
Class	Security Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.1.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 2.0.0p10 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0p26 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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