code: function addParts(config, parts, value) {
          const part = parts.shift();
          if (parts.length === 0) {
            // Convert string values "true" and "false" to booleans
            if (value === 'false') { value = false; }
            if (value === 'true') { value = true; }
            config[part] = value;
          } else {
            if (config[part] === undefined) {
              config[part] = {};
            }
            addParts(config[part], parts, value);
          }
        }
docs: We transform MYRMEX_myConfig_levels = value into { config: { myConfig: { levels: value } } }