Werk #13205: mtr: Fix performance graphs

Component Checks & Agents
Title mtr: Fix performance graphs
Date Sep 3, 2021
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.1.0i1 2.0.0p10
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

The performance graphs of the check plugin mtr, which monitors network diagnostiscs produced by MTR, were crashing with

Cannot calculate graph recipes Syntax error in expression ...

This has been fixed.

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