docs: update AUTHORS file

Signed-off-by: Karel Zak <kzak@redhat.com>

AUTHORS

@@ -28,6 +28,7 @@ AUTHORS (merged projects & commands):
 
 CONTRIBUTORS:
 
+      A. Costa <agcosta@gis.net>
       Alan Curry <pacman@TheWorld.com>
       Arkadiusz Miskiewicz <arekm@maven.pl>
       Balint Cristian <cbalint@redhat.com>
@@ -43,6 +44,7 @@ CONTRIBUTORS:
       Justin B Rye <jbr@edlug.org.uk>
       Kay Sievers <kay.sievers@vrfy.org>
       LaMont Jones <lamont@mmjgroup.com>
+      Li Zefan <lizf@cn.fujitsu.com>
       Luciano Chavez <lnx1138@us.ibm.com>
       Marco d'Itri <md@Linux.IT>
       Martin Schlemmer <azarah@gentoo.org>
@@ -50,6 +52,7 @@ CONTRIBUTORS:
       Matthias Koenig <mkoenig@suse.de>
       Mike Frysinger <vapier@gentoo.org>
       Moritz Muehlenhoff <jmm@inutil.org>
+      Norbert Buchmuller <norbi@nix.hu>
       Pádraig Brady <P@draigBrady.com>
       Ram Pai <linuxram@us.ibm.com>
       Samuel Thibault <samuel.thibault@ens-lyon.org>