Migrate .arcconfig to mid 2020 changes of "arc land"
Migrate .arcconfig to mid 2020 changes of "arc land"

Summary: Fixes T27611.

Test Plan: Landing of this revision.

Reviewers: O1 MITK Reviewer Group I, floca

Reviewed By: O1 MITK Reviewer Group I, floca

Maniphest Tasks: T27611

Differential Revision: https://phabricator.mitk.org/D359

MITK/MITK,MITK/MITK,MITK/MITK,MITK/MITK,MITK/MITK,MITK/MITK