Checkmk Werk 10122: Fixed performance regression for event console history queries.

ID: 10122 Title: Fixed performance regression for event console history queries. Component: Event Console Level: 2 Class: Bug fix Version: 1.7.0i1 The event console history queries had a rather serious performance regression in 1.6.0: For common queries, the EC tries to pre-filter the history via egrep before doing further filtering itself. This pre-filtering was broken due to a typo and has been repaired now.