=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Server: GitHub.com
Content-Type: text/html
Location: https://jekyllrb.com/
X-GitHub-Request-Id: 8950:5CA9:4119A9:563565:5CB2C076
Content-Length: 178
Accept-Ranges: bytes
Date: Sun, 14 Apr 2019 05:09:11 GMT
Via: 1.1 varnish
Age: 0
Connection: close
X-Served-By: cache-fty21331-FTY
X-Cache: MISS
X-Cache-Hits: 0
X-Timer: S1555218551.497833,VS0,VE19
Vary: Accept-Encoding
X-Fastly-Request-ID: b079a74d1388f55c21e0f91197afb7eadc940ded

HTTP/2 200 
server: GitHub.com
content-type: text/html; charset=utf-8
last-modified: Tue, 26 Mar 2019 21:22:24 GMT
etag: &quot;5c9a9810-2887&quot;
access-control-allow-origin: *
expires: Fri, 12 Apr 2019 18:34:26 GMT
cache-control: max-age=600
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date: Sun, 14 Apr 2019 05:09:11 GMT
via: 1.1 varnish
age: 0
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vary: Accept-Encoding
x-fastly-request-id: aaf1cff5ebae9e67b33f56590a5f9ce60adb9391
content-length: 10375

Request headers
================
HEAD / HTTP/2
Host: jekyllrb.com
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Accept: */*
Referer: https://itxdesign.com
Connection: close


Link is valid.