title: Change given HTTP referer url
body: <p>does someone know how to change the HTTP referer URL your website gives when redirecting.</p>
  
  <p>I have the following problem:
  I own four websites. Most traffic comes in on website A. Because my guest want to download stuff i redirect them to my other website B, C and D. This to keep the server running website A clean and fast.</p>
  
  <p>Now i have come to the point that there are a lot of posts redirecting to a third party. This third party can see that these people are redirected from website B, C or D. </p>
  
  <p>The point is that i want the third party to know that these people originally came from website A. Therefor i want to give the URL from website A as HTTP referer URL when people actually come from B, C, or D.</p>
  
  <p>Is this possible? In my eyes the solution should look something like extra code on the page people are redirected from.</p>