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Werk #11800: Avoid escaping in custom host attributes

Component Setup
Title Avoid escaping in custom host attributes
Date Apr 7, 2021
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.1.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT
2.0.0p2 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT
1.6.0p23 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

In case custom host attributes where containing special characters (e.g. "&"), they where stored escaped on disk and therfore also displayed escaped in the GUI. This fix is applied during omd update, so no manual interaction is needed when updating to this patchlevel.

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