Werk #14161: Setup: do not create unknown folders

Component	Setup
Title	Setup: do not create unknown folders
Date	Jun 28, 2022
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0p5 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

When using the setup with an unknown folder name, this folder was created on the hard disk instead of giving an error message

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