Add list of Obnam errors to manual

This also drops the find-all-obnam-errors in favour of
"obnam list-errors".

1 files changed, 10 insertions, 0 deletions

diff --git a/manual/en/800-errors.mdwn b/manual/en/800-errors.mdwn
new file mode 100644
index 00000000..e42580cf
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+Appendix: Error messages
+========================
+
+This appendix lists all Obnam error messages and their explanations.
+It is possible you'll see other error messages while running Obnam.
+These are not listed here, as Obnam doesn't know about them.
+
+The errors are listed twice: briefly, in order of their unique
+error, and then more fully, in alphabetical order.
+