docs: restructure release notes into separate folder

relnotes-*html > relnotes/*html
RELNOTES-* > relnotes/*
fix links, css and frames

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
diff --git a/docs/devinfo.html b/docs/devinfo.html
index c89bfc0..5c03344 100644
--- a/docs/devinfo.html
+++ b/docs/devinfo.html
@@ -203,10 +203,10 @@
 </dl>
 
 <p>
-Create a docs/relnotes-x.y.z.html file.
+Create a docs/relnotes/x.y.z.html file.
 The bin/shortlog_mesa.sh script can be used to create a HTML-formatted list
 of changes to include in the file.
-Link the new docs/relnotes-x.y.z.html file into the main <a href="relnotes.html">relnotes.html</a> file.
+Link the new docs/relnotes/x.y.z.html file into the main <a href="relnotes.html">relnotes.html</a> file.
 </p>
 
 <p>
@@ -231,7 +231,7 @@
 <p>
 After the tarballs are created, the md5 checksums for the files will
 be computed.
-Add them to the docs/relnotes-x.y.html file.
+Add them to the docs/relnotes/x.y.html file.
 </p>
 
 <p>