text: -- // CB-2411 added tunnel type
  -- Migration SQL that makes the change goes here.
  
  ALTER TABLE environment ADD COLUMN IF NOT EXISTS tunnel varchar(255) NOT NULL DEFAULT 'DIRECT';
  
  UPDATE environment SET tunnel = 'DIRECT';
  
  -- //@UNDO
  -- SQL to undo the change goes here.
  
  ALTER TABLE environment DROP COLUMN IF EXISTS tunnel;
  
  