=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Server: GitHub.com
Date: Wed, 01 Dec 2021 00:15:32 GMT
Content-Type: text/html
Content-Length: 162
Location: http://prototypejs.org/
X-GitHub-Request-Id: 91B0:3DB3:384AA4:563C38:61A6BEA4
connection: close

HTTP/1.1 200 OK
Server: GitHub.com
Date: Wed, 01 Dec 2021 00:15:33 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 3534
Vary: Accept-Encoding
Last-Modified: Thu, 01 Oct 2015 02:56:33 GMT
Vary: Accept-Encoding
Access-Control-Allow-Origin: *
ETag: &quot;560ca0e1-dce&quot;
expires: Wed, 01 Dec 2021 00:25:33 GMT
Cache-Control: max-age=600
Accept-Ranges: bytes
x-proxy-cache: MISS
X-GitHub-Request-Id: 92A4:0CA6:1912BE:358140:61A6BEA5
connection: close

Request headers
================
HEAD / HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: prototypejs.org
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.