tools: bpftool: drop unnecessary Author comments

Drop my author comments, those are from the early days of
bpftool and make little sense in tree, where we have quite
a few people contributing and git to attribute the work.

While at it bump some copyrights.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

tools/bpf/bpftool/common.c

@@ -31,8 +31,6 @@
  * SOFTWARE.
  */
 
-/* Author: Jakub Kicinski <kubakici@wp.pl> */
-
 #include <ctype.h>
 #include <errno.h>
 #include <fcntl.h>

tools/bpf/bpftool/main.c

 /*
- * Copyright (C) 2017 Netronome Systems, Inc.
+ * Copyright (C) 2017-2018 Netronome Systems, Inc.
  *
  * This software is dual licensed under the GNU General License Version 2,
  * June 1991 as shown in the file COPYING in the top-level directory of this
@@ -31,8 +31,6 @@
  * SOFTWARE.
  */
 
-/* Author: Jakub Kicinski <kubakici@wp.pl> */
-
 #include <bfd.h>
 #include <ctype.h>
 #include <errno.h>

tools/bpf/bpftool/main.h

@@ -31,8 +31,6 @@
  * SOFTWARE.
  */
 
-/* Author: Jakub Kicinski <kubakici@wp.pl> */
-
 #ifndef __BPF_TOOL_H
 #define __BPF_TOOL_H
 

tools/bpf/bpftool/map.c

@@ -31,8 +31,6 @@
  * SOFTWARE.
  */
 
-/* Author: Jakub Kicinski <kubakici@wp.pl> */
-
 #include <assert.h>
 #include <errno.h>
 #include <fcntl.h>

tools/bpf/bpftool/prog.c

 /*
- * Copyright (C) 2017 Netronome Systems, Inc.
+ * Copyright (C) 2017-2018 Netronome Systems, Inc.
  *
  * This software is dual licensed under the GNU General License Version 2,
  * June 1991 as shown in the file COPYING in the top-level directory of this
@@ -31,8 +31,6 @@
  * SOFTWARE.
  */
 
-/* Author: Jakub Kicinski <kubakici@wp.pl> */
-
 #include <errno.h>
 #include <fcntl.h>
 #include <stdarg.h>