mailmap: Sandon Van Ness name normalization

Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Michael Nelson affiliation

Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Paul Meserve affiliation

Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Nikola Kotur affiliation

Reviewed-by: Nikola Kotur <kotnick@gmail.com>
Signed-off-by: Loic Dachary <loic@dachary.org>
mailmap: Yan, Zheng name normalization

Signed-off-by: Loic Dachary <loic@dachary.org>
Merge pull request #1622 from dachary/wip-mailmap

mailmap updates

Reviewed-By: Christophe Courtaut <christophe.courtaut@gmail.com>