Prevent undesired Date parsing

Native Date parsing is unpredictable and will occasionally turn a string
like "/foo/1" into a valid date of Jan 1, 2001.  This can be prevented
by not parsing a string that begins with a slash.

It's likely that this is a rare case, but it's annoying when it does
come up.

querystring/parse.js

@@ -15,7 +15,7 @@ module.exports = function(string) {
 		if (value !== "" && !isNaN(number) || value === "NaN") value = number
 		else if (value === "true") value = true
 		else if (value === "false") value = false
-		else {
+		else if (value.charAt(0) !== "/") {
 			var date = new Date(value)
 			if (!isNaN(date.getTime())) value = date
 		}