Андрей Буров

As Brian Doll, GitHub's VP of Marketing explains it here:

Code without an explicit license is protected by copyright and is by default All Rights Reserved. The person or people who wrote the code are protected as such. Any time you're using software you didn't write, licensing should be considered and abided.

<meta http-equiv="refresh"
   content="0; url=http://example.org/new-page.html">

HTML redirect. HTML meta refresh redirection code.
HTML meta refresh redirect is a client side redirect and is not 301 permanent redirect.
The HTML meta refresh with 0 seconds time interval, is considered by Google as a hint for 301 redirect for pagerank transfer.
If you want to do real 301 permanent redirect, you can do it with PHP redirect after enabling PHP code in HTML files.

header("HTTP/1.1 301 Moved Permanently"); 
header("Location: http://example.org/new-page.html");