show .diff/Index properly as ignored if we fallback

Moving the code responsible for parsing the Index file from ::Done into
the slightly earlier ::VerifyDone allows us to still "fail" the download
if we can't make use of the Index for whatever reason, so that the
progress log correctly displays "Ign" instead of "Get" for the file.

This also makes quiet a few debug messages proper error messages (but
those are still hidden by default for Ign lines).

0 files changed, 0 insertions, 0 deletions