mailmap: fixups of some contributors

.mailmap

@@ -67,3 +67,8 @@ Douglas Steinwand <dzs-curl@dzs.fx.org>
 James Fuller <jim@webcomposite.com>
 Don J Olmstead <don.j.olmstead@gmail.com>
 Nicolas Sterchele <sterchelen@gmail.com>
+Sergey Raevskiy <ccik@inbox.ru>
+SecuritySense on github <si@securitysense.co.uk>
+Mipsters on github <tomaviv57@gmail.com>
+Pavel Novikov <paul.skeptic@yandex.ru>
+apique13 on github <apique@PC42.isdom.isoft.fr>