function init (debug) {
		  debug.inspectOpts = {};

		  var keys = Object.keys(exports.inspectOpts);
		  for (var i = 0; i < keys.length; i++) {
		    debug.inspectOpts[keys[i]] = exports.inspectOpts[keys[i]];
		  }
		}
Normalize the index option into an array.

@param {boolean|string|array} val
@param {string} name
@private