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

20 files changed, 20 insertions, 20 deletions

diff --git a/grp/Makefile b/grp/Makefile
index 20683f6..a394023 100644
--- a/grp/Makefile
+++ b/grp/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 1991-2020 Free Software Foundation, Inc.
+# Copyright (C) 1991-2021 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/grp/fgetgrent.c b/grp/fgetgrent.c
index fc0bd52..81bbd9d 100644
--- a/grp/fgetgrent.c
+++ b/grp/fgetgrent.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2021 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/grp/fgetgrent_r.c b/grp/fgetgrent_r.c
index b598584..115eb81 100644
--- a/grp/fgetgrent_r.c
+++ b/grp/fgetgrent_r.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2021 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/grp/getgrent.c b/grp/getgrent.c
index e758cca..e82fc42 100644
--- a/grp/getgrent.c
+++ b/grp/getgrent.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
 
diff --git a/grp/getgrent_r.c b/grp/getgrent_r.c
index 49529c7..0ffd533 100644
--- a/grp/getgrent_r.c
+++ b/grp/getgrent_r.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
 
diff --git a/grp/getgrgid.c b/grp/getgrgid.c
index e87b2fc..525ca21 100644
--- a/grp/getgrgid.c
+++ b/grp/getgrgid.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
 
diff --git a/grp/getgrgid_r.c b/grp/getgrgid_r.c
index 7c740c7..9acd981 100644
--- a/grp/getgrgid_r.c
+++ b/grp/getgrgid_r.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
 
diff --git a/grp/getgrnam.c b/grp/getgrnam.c
index afa12f9..2d1dedb 100644
--- a/grp/getgrnam.c
+++ b/grp/getgrnam.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
 
diff --git a/grp/getgrnam_r.c b/grp/getgrnam_r.c
index 7f80c57..ee6a713 100644
--- a/grp/getgrnam_r.c
+++ b/grp/getgrnam_r.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
 
diff --git a/grp/grp-merge.c b/grp/grp-merge.c
index 77f5c0c..983237d 100644
--- a/grp/grp-merge.c
+++ b/grp/grp-merge.c
@@ -1,5 +1,5 @@
 /* Group merging implementation.
-   Copyright (C) 2016-2020 Free Software Foundation, Inc.
+   Copyright (C) 2016-2021 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/grp/grp-merge.h b/grp/grp-merge.h
index b6fc258..bc2a472 100644
--- a/grp/grp-merge.h
+++ b/grp/grp-merge.h
@@ -1,5 +1,5 @@
 /* Group merging implementation.
-   Copyright (C) 2016-2020 Free Software Foundation, Inc.
+   Copyright (C) 2016-2021 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/grp/grp.h b/grp/grp.h
index 396ef05..36f9954 100644
--- a/grp/grp.h
+++ b/grp/grp.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2021 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/grp/initgroups.c b/grp/initgroups.c
index 22736a1..6164d16 100644
--- a/grp/initgroups.c
+++ b/grp/initgroups.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1989, 1991-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1989, 1991-2021 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/grp/putgrent.c b/grp/putgrent.c
index 7d10b8e..0da6167 100644
--- a/grp/putgrent.c
+++ b/grp/putgrent.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2021 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/grp/setgroups.c b/grp/setgroups.c
index f5b3e1b..3aaea49 100644
--- a/grp/setgroups.c
+++ b/grp/setgroups.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2021 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/grp/tst-initgroups1.c b/grp/tst-initgroups1.c
index f6551ca..3ea7240 100644
--- a/grp/tst-initgroups1.c
+++ b/grp/tst-initgroups1.c
@@ -1,5 +1,5 @@
 /* Test that initgroups works.
-   Copyright (C) 2020 Free Software Foundation, Inc.
+   Copyright (C) 2020-2021 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/grp/tst-initgroups2.c b/grp/tst-initgroups2.c
index 776e560..ea2c915 100644
--- a/grp/tst-initgroups2.c
+++ b/grp/tst-initgroups2.c
@@ -1,5 +1,5 @@
 /* Test that initgroups works.
-   Copyright (C) 2020 Free Software Foundation, Inc.
+   Copyright (C) 2020-2021 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/grp/tst-putgrent.c b/grp/tst-putgrent.c
index 3bc254f..493267d 100644
--- a/grp/tst-putgrent.c
+++ b/grp/tst-putgrent.c
@@ -1,5 +1,5 @@
 /* Test for processing of invalid group entries.  [BZ #18724]
-   Copyright (C) 2015-2020 Free Software Foundation, Inc.
+   Copyright (C) 2015-2021 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/grp/tst_fgetgrent.c b/grp/tst_fgetgrent.c
index fc97e42..bffa7d4 100644
--- a/grp/tst_fgetgrent.c
+++ b/grp/tst_fgetgrent.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1999-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1999-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Andreas Jaeger <aj@arthur.rhein-neckar.de>, 1999.
 
diff --git a/grp/tst_fgetgrent.sh b/grp/tst_fgetgrent.sh
index d0bf84f..048104e 100644
--- a/grp/tst_fgetgrent.sh
+++ b/grp/tst_fgetgrent.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright (C) 1999-2020 Free Software Foundation, Inc.
+# Copyright (C) 1999-2021 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 # Contributed by Andreas Jaeger <aj@arthur.rhein-neckar.de>, 1999.