Update copyright dates with scripts/update-copyrights

I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master

8 files changed, 8 insertions, 8 deletions

diff --git a/hesiod/Makefile b/hesiod/Makefile
index 8bf0e3a90a..7d1b1f9a63 100644
--- a/hesiod/Makefile
+++ b/hesiod/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 1997-2020 Free Software Foundation, Inc.
+# Copyright (C) 1997-2021 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
diff --git a/hesiod/hesiod.c b/hesiod/hesiod.c
index 80bcd5c8da..ee3e2648eb 100644
--- a/hesiod/hesiod.c
+++ b/hesiod/hesiod.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/hesiod/hesiod.h b/hesiod/hesiod.h
index 5f2510cfcf..39707a8772 100644
--- a/hesiod/hesiod.h
+++ b/hesiod/hesiod.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/hesiod/hesiod_p.h b/hesiod/hesiod_p.h
index e1ff0b754c..81a9c061a1 100644
--- a/hesiod/hesiod_p.h
+++ b/hesiod/hesiod_p.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/hesiod/nss_hesiod/hesiod-grp.c b/hesiod/nss_hesiod/hesiod-grp.c
index 158d4f02d8..fccbb624e1 100644
--- a/hesiod/nss_hesiod/hesiod-grp.c
+++ b/hesiod/nss_hesiod/hesiod-grp.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
 
diff --git a/hesiod/nss_hesiod/hesiod-proto.c b/hesiod/nss_hesiod/hesiod-proto.c
index 03f4fa2131..c9c6f6c79b 100644
--- a/hesiod/nss_hesiod/hesiod-proto.c
+++ b/hesiod/nss_hesiod/hesiod-proto.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
 
diff --git a/hesiod/nss_hesiod/hesiod-pwd.c b/hesiod/nss_hesiod/hesiod-pwd.c
index 36ca3d1a19..82e44d944e 100644
--- a/hesiod/nss_hesiod/hesiod-pwd.c
+++ b/hesiod/nss_hesiod/hesiod-pwd.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
 
diff --git a/hesiod/nss_hesiod/hesiod-service.c b/hesiod/nss_hesiod/hesiod-service.c
index ce93fd3d8f..04ad763e77 100644
--- a/hesiod/nss_hesiod/hesiod-service.c
+++ b/hesiod/nss_hesiod/hesiod-service.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.