Correct README to describe XEvIE instead of EVI extension
Correct README to describe XEvIE instead of EVI extension

Yes, we had two little used extensions with very different
purposes but very similar names.   Naming is hard.

While we're in here, document that this extension is no longer
supported in the Xserver.

Signed-off-by: Alan Coopersmith <ea3248f8c2440b9439894eab21ef26209b22bacf@oracle.com>

freedesktop-unofficial-mirror/xorg__proto__evieproto,freedesktop-unofficial-mirror/xorg__proto__evieproto