Checkmk Werk 13471: mk_logwatch: validate regular expressions upon rule creation

ID: 13471 Title: mk_logwatch: validate regular expressions upon rule creation Component: Setup Level: 1 Class: Bug fix Version: 2.1.0i1 Previously invalid regular expressons in the mk_logwatch configuration where not properly validated, leading to a crash of the plugin on the monitored host. We now validate the configured expressions during rule creation.