Werk #5887: Protect against checks overriding Check_MK internal config variables

Component Core & setup
Title Protect against checks overriding Check_MK internal config variables
Date Mar 5, 2018
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 1.5.0b1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

When a check declares a Check_MK internal configuration variable in it's global namespace, for example "service_descriptions", it was overrding Check_MK internal configuration variables with this statement in previous Check_MK versions.

Check_MK now prevents the checks from overriding already known configuration variables.

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