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

13 files changed, 13 insertions, 13 deletions

diff --git a/sysdeps/mach/hurd/bits/fcntl.h b/sysdeps/mach/hurd/bits/fcntl.h
index 6678033857..6836b75334 100644
--- a/sysdeps/mach/hurd/bits/fcntl.h
+++ b/sysdeps/mach/hurd/bits/fcntl.h
@@ -1,5 +1,5 @@
 /* O_*, F_*, FD_* bit values for GNU.
-   Copyright (C) 1993-2020 Free Software Foundation, Inc.
+   Copyright (C) 1993-2021 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/sysdeps/mach/hurd/bits/ioctls.h b/sysdeps/mach/hurd/bits/ioctls.h
index 1226186ff9..488f6a2100 100644
--- a/sysdeps/mach/hurd/bits/ioctls.h
+++ b/sysdeps/mach/hurd/bits/ioctls.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1992-2021 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/sysdeps/mach/hurd/bits/local_lim.h b/sysdeps/mach/hurd/bits/local_lim.h
index 8e781e4965..0450e29f44 100644
--- a/sysdeps/mach/hurd/bits/local_lim.h
+++ b/sysdeps/mach/hurd/bits/local_lim.h
@@ -1,5 +1,5 @@
 /* Minimum guaranteed maximum values for system limits.  Hurd version.
-   Copyright (C) 1993-2020 Free Software Foundation, Inc.
+   Copyright (C) 1993-2021 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/sysdeps/mach/hurd/bits/param.h b/sysdeps/mach/hurd/bits/param.h
index c288664b65..5a9fa19094 100644
--- a/sysdeps/mach/hurd/bits/param.h
+++ b/sysdeps/mach/hurd/bits/param.h
@@ -1,5 +1,5 @@
 /* Old-style Unix parameters and limits.  Hurd version.
-   Copyright (C) 1993-2020 Free Software Foundation, Inc.
+   Copyright (C) 1993-2021 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/sysdeps/mach/hurd/bits/posix_opt.h b/sysdeps/mach/hurd/bits/posix_opt.h
index 0050151332..f8058410fe 100644
--- a/sysdeps/mach/hurd/bits/posix_opt.h
+++ b/sysdeps/mach/hurd/bits/posix_opt.h
@@ -1,5 +1,5 @@
 /* Define POSIX options for GNU/Hurd.
-   Copyright (C) 1998-2020 Free Software Foundation, Inc.
+   Copyright (C) 1998-2021 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/sysdeps/mach/hurd/bits/signum-arch.h b/sysdeps/mach/hurd/bits/signum-arch.h
index bfcb37a47c..c84f926fb9 100644
--- a/sysdeps/mach/hurd/bits/signum-arch.h
+++ b/sysdeps/mach/hurd/bits/signum-arch.h
@@ -1,5 +1,5 @@
 /* Signal number constants.  Specific architecture definitions.
-   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/sysdeps/mach/hurd/bits/socket.h b/sysdeps/mach/hurd/bits/socket.h
index ff898aa188..5210a7b449 100644
--- a/sysdeps/mach/hurd/bits/socket.h
+++ b/sysdeps/mach/hurd/bits/socket.h
@@ -1,5 +1,5 @@
 /* System-specific socket constants and types.  Hurd version.
-   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.
 
diff --git a/sysdeps/mach/hurd/bits/stat.h b/sysdeps/mach/hurd/bits/stat.h
index bcb8fb747f..e2275697c7 100644
--- a/sysdeps/mach/hurd/bits/stat.h
+++ b/sysdeps/mach/hurd/bits/stat.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1992-2021 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/sysdeps/mach/hurd/bits/statfs.h b/sysdeps/mach/hurd/bits/statfs.h
index a659ba3cfa..e9b1b9c397 100644
--- a/sysdeps/mach/hurd/bits/statfs.h
+++ b/sysdeps/mach/hurd/bits/statfs.h
@@ -1,5 +1,5 @@
 /* Definition of `struct statfs', information about a filesystem.
-   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.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/mach/hurd/bits/statvfs.h b/sysdeps/mach/hurd/bits/statvfs.h
index e5e5625af3..23b3333dbb 100644
--- a/sysdeps/mach/hurd/bits/statvfs.h
+++ b/sysdeps/mach/hurd/bits/statvfs.h
@@ -1,5 +1,5 @@
 /* Definition of `struct statvfs', information about a filesystem.
-   Copyright (C) 1998-2020 Free Software Foundation, Inc.
+   Copyright (C) 1998-2021 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/sysdeps/mach/hurd/bits/sysmacros.h b/sysdeps/mach/hurd/bits/sysmacros.h
index 52edc92e4a..47308bac6a 100644
--- a/sysdeps/mach/hurd/bits/sysmacros.h
+++ b/sysdeps/mach/hurd/bits/sysmacros.h
@@ -1,5 +1,5 @@
 /* Definitions of macros to access `dev_t' values.  Hurd version.
-   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.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/mach/hurd/bits/types/error_t.h b/sysdeps/mach/hurd/bits/types/error_t.h
index 6829164d84..0b101a6afe 100644
--- a/sysdeps/mach/hurd/bits/types/error_t.h
+++ b/sysdeps/mach/hurd/bits/types/error_t.h
@@ -1,5 +1,5 @@
 /* Define error_t.
-   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/sysdeps/mach/hurd/bits/typesizes.h b/sysdeps/mach/hurd/bits/typesizes.h
index 10f3ac231a..36adbe09c4 100644
--- a/sysdeps/mach/hurd/bits/typesizes.h
+++ b/sysdeps/mach/hurd/bits/typesizes.h
@@ -1,5 +1,5 @@
 /* bits/typesizes.h -- underlying types for *_t.  Hurd version.
-   Copyright (C) 2002-2020 Free Software Foundation, Inc.
+   Copyright (C) 2002-2021 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