Werk #6635: printer_alerts: Fix handling for Sleep state

Component Checks & agents
Title printer_alerts: Fix handling for Sleep state
Date Nov 12, 2018
Checkmk Edition Checkmk Raw (CRE)
Checkmk Version 1.5.0p8 1.6.0b1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

Some printers report states not defined in the MIB. A reasonably common case appears to be the printer going to sleep, which should be treated as OK instead of UNKNOWN.

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