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

ID: 13384 Title: Fix 'Request-URI Too Long' error on rule search Component: Setup Level: 1 Class: Bug fix Version: 2.1.0i1 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.