Werk #3754: Cluster nodes are now correctly validated for invalid characters

Component Setup
Title Cluster nodes are now correctly validated for invalid characters
Date Aug 3, 2016
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
1.4.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)
1.2.8p9 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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