Werk #16656: REST API: improve validation of host names

Component	REST API
Title	REST API: improve validation of host names
Date	Mar 26, 2024
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.4.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.3.0b4 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

This werk improves upon the validation of host names in the REST API, so that it is in line with the GUI. In some cases the REST API will still be more restrictive, but invalid host names will no longer be allowed.

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