Werk #3999: Added core restart note to bulk host rename page

Component	Setup
Title	Added core restart note to bulk host rename page
Date	Dec 9, 2016
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.4.0i3 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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