docs: fix gamma correction link

That link has been dead for 15 years...
We could link to Archive.org [1] to get the last time this page existed,
but I feel like Wikipedia is a better choice.

[1] http://web.archive.org/web/20021211151318/http://www.inforamp.net/~poynton/notes/colour_and_gamma/GammaFAQ.html

Signed-off-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

diff --git a/docs/xlibdriver.html b/docs/xlibdriver.html
index fc8c201fcd4373fa0ee25cc2ce87706dfc40641d..b4de10e36f12ab86b073dc8fabe19a816c3d2e8d 100644 (file)
--- a/docs/xlibdriver.html
+++ b/docs/xlibdriver.html
@@ -171,9 +171,8 @@ drawn with glDrawPixels.
 </p>
 
 <p>
-For more information about gamma correction see:
-<a href="http://www.inforamp.net/~poynton/notes/colour_and_gamma/GammaFAQ.html">
-the Gamma FAQ</a>
+For more information about gamma correction, see the
+<a href="https://en.wikipedia.org/wiki/Gamma_correction">Wikipedia article</a>
 </p>