mailmap/gitdm: more fixes for bad tags and authors

mailmap/gitdm: more fixes for bad tags and authors

I was running some historical tags for the last 10 years and got the
following warnings:

  git log --use-mailmap --numstat --since "June 2010" | ~/src/gitdm.git/gitdm -n -l 5
  [email protected] is an author name, probably not what you want
  bad utf-8 ('utf-8' codec can't decode byte 0xe4 in position 552: invalid continuation byte) in patchm skipping
  bad utf-8 ('utf-8' codec can't decode byte 0xe4 in position 342: invalid continuation byte) in patchm skipping
  [email protected]  is an author name, probably not what you want
  Oops...funky email nicta.com.au
  bad utf-8 ('utf-8' codec can't decode byte 0xe9 in position 232: invalid continuation byte) in patchm skipping
  Oops...funky email andreas.faerber
  Grabbing changesets...done
  Processed 76422 csets from 1902 developers

The following fixes try and alleviate that although I still get a
warning for Aaron which I think is from 9743cd5736.

Signed-off-by: Alex Bennée <[email protected]>
Message-Id: <20220315121251.2280317[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Acked-by: Aaron Larson <[email protected]>
Acked-by: Michael Ellerman <[email protected]>
Cc: Andreas Färber <[email protected]>
Cc: Jason Wang <[email protected]>