Werk #13886: Improved performance of various Livestatus queries

Component	Livestatus
Title	Improved performance of various Livestatus queries
Date	Mar 29, 2022
Level	Trivial Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0b4 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

For Livestatus queries containing an AuthUser header, authorization is now checked immediately before any potentially complicated filters are evaluated. Those authorization checks are fairly cheap, so depending on the AuthUser and the filters used, performance can be improved quite a bit.

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