Werk #13384: Fix 'Request-URI Too Long' error on rule search

Component Setup
Title Fix 'Request-URI Too Long' error on rule search
Date Nov 4, 2021
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.0.0p16 2.1.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

The rule search could produce a 'Request-URI Too Long' exception because all variables of the search form were submitted.

This problem could occur, for example, in installations with a large number of host tags.

We now filter out all unused variables to avoid exceeding the server capacity.

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