AUTHORS: add s3 VFS authors.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

AUTHORS

@@ -59,6 +59,9 @@ Anton Chumak <nightfast@yahoo.co.uk>
 Antonio Palama, DOS port <palama@posso.dm.unipi.it>
 	DOS port.
 
+Dmitry Koterov <dmitry.koterov@gmail.com>
+	s3 extfs bugfixes and emprovements
+
 Egmont Koblinger <egmont@gmail.com>
         Support of 256 colors
         Support of italic text
@@ -73,6 +76,9 @@ Gerd Knorr <kraxel@cs.tu-berlin.de>
 
 Ilya Rybkin <rybkin@rouge.phys.lsu.edu>
 
+Jakob Kemi <jakob.kemi@gmail.com>
+	s3 extfs
+
 Jean-Daniel Luiset <luiset@cih.hcuge.ch>
 
 John Davis <davis@space.mit.edu>