Checkmk Werk 7825: NagVis: Fix missing worldmap background

ID: 7825 Title: NagVis: Fix missing worldmap background Component: Site Management Level: 1 Class: Bug fix Version: 1.7.0i1 Rendering of the Openstreetmap tiles used by the NagVis worldmap was prevented by the new Content security policy. Access to https://*.tile.openstreetmap.org/ is now allowed by the policy.