docs: assorted updates, link fixes
diff --git a/docs/envvars.html b/docs/envvars.html
index 7b64dc9..7fd9fe7 100644
--- a/docs/envvars.html
+++ b/docs/envvars.html
@@ -29,7 +29,7 @@
 
 <p>
 The following are only applicable to the Xlib software driver.
-See <A HREF="README.X11">README.X11</A> for details.
+See the <A HREF="xlibdriver.html">Xlib software driver page</A> for details.
 </p>
 <ul>
 <li>MESA_RGB_VISUAL - specifies the X visual and depth for RGB mode