[devhelp] attic: write TODO

[Sébastien Wilmet <swilmet src gnome org>]

commit af98f14fe3333dd679d4c0b98ff7ef3f8abee597
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Fri Dec 22 15:46:04 2017 +0100

    attic: write TODO

 attic/TODO |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/attic/TODO b/attic/TODO
new file mode 100644
index 0000000..cd2e894
--- /dev/null
+++ b/attic/TODO
@@ -0,0 +1,9 @@
+TODO Devhelp attic
+==================
+
+Triage the files, remove what is no longer needed, and better document what is
+still useful (if it's still useful it can be moved to another directory).
+
+For describing the index file format, a *.rng file would be better. The
+devhelp-1.dtd seems to describe the index file format version 1, which is
+deprecated. What are the other *.dtd files?