s3:winbind: Implement dcerpc_samr_chgpasswd_user4 for PamAuthChangePassword
Signed-off-by:Andreas Schneider <asn@samba.org> Reviewed-by:
Stefan Metzmacher <metze@samba.org> Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org> Autobuild-Date(master): Thu Jul 28 12:47:31 UTC 2022 on sn-devel-184