Werk #13144: Add builtin host label "cmk/site"

Component Core & Setup
Title Add builtin host label "cmk/site"
Date Sep 16, 2021
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.1.0i1
Level Trivial Change
Class New Feature
Compatibility Incompatible - Manual interaction might be required

Every host now discovers a builtin host label cmk/site:[sitename].

This can be used in rule conditions to filter for hosts on specific sites

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