mailmap: update entries for Stephen Hemminger

Map all my old email addresses to current address.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Link: https://lore.kernel.org/r/20230306194405.108236-1-stephen@networkplumber.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

.mailmap

@@ -411,7 +411,10 @@ Shuah Khan <shuah@kernel.org> <shuah.kh@samsung.com>
 Simon Arlott <simon@octiron.net> <simon@fire.lp0.eu>
 Simon Kelley <simon@thekelleys.org.uk>
 Stéphane Witzmann <stephane.witzmann@ubpmes.univ-bpclermont.fr>
-Stephen Hemminger <shemminger@osdl.org>
+Stephen Hemminger <stephen@networkplumber.org> <shemminger@linux-foundation.org>
+Stephen Hemminger <stephen@networkplumber.org> <shemminger@osdl.org>
+Stephen Hemminger <stephen@networkplumber.org> <sthemmin@microsoft.com>
+Stephen Hemminger <stephen@networkplumber.org> <sthemmin@vyatta.com>
 Steve Wise <larrystevenwise@gmail.com> <swise@chelsio.com>
 Steve Wise <larrystevenwise@gmail.com> <swise@opengridcomputing.com>
 Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>