Werk #6023: Add build support for Ubuntu 18.04 (bionic)

Component	Linux distributions
Title	Add build support for Ubuntu 18.04 (bionic)
Date	Apr 20, 2018
Level	Trivial Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT 1.5.0b2 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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