docs: add links to clarify patch mailing section

* Changed "Mesa mailing list" to "mesa-dev mailing list" to clarify
  which list patches should be sent to

* Added an explicit link to
  https://lists.freedesktop.org/mailman/listinfo/mesa-dev to show
  where to subscribe to the list

* Added a link to https://git-scm.com/docs/git-send-email to help new
  users of that command

v2: add signed-off-by

Signed-off-by: Nicholas Bishop <nicholasbishop@gmail.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Chad Versace <chadversary@chromium.org>
diff --git a/docs/devinfo.html b/docs/devinfo.html
index 489d263..afd92fd 100644
--- a/docs/devinfo.html
+++ b/docs/devinfo.html
@@ -252,10 +252,14 @@
 <h3>Mailing Patches</h3>
 
 <p>
-Patches should be sent to the Mesa mailing list for review.
-When submitting a patch make sure to use git send-email rather than attaching
-patches to emails. Sending patches as attachments prevents people from being
-able to provide in-line review comments.
+Patches should be sent to the mesa-dev mailing list for review:
+<a href="https://lists.freedesktop.org/mailman/listinfo/mesa-dev">
+mesa-dev@lists.freedesktop.org<a/>.
+When submitting a patch make sure to use
+<a href="https://git-scm.com/docs/git-send-email">git send-email</a>
+rather than attaching patches to emails. Sending patches as
+attachments prevents people from being able to provide in-line review
+comments.
 </p>
 
 <p>