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

19 files changed, 19 insertions, 19 deletions

diff --git a/sysdeps/gnu/Makefile b/sysdeps/gnu/Makefile
index 9cf34c8ac6..36c67fb585 100644
--- a/sysdeps/gnu/Makefile
+++ b/sysdeps/gnu/Makefile
@@ -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.
 
 # The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/gnu/bits/ipc.h b/sysdeps/gnu/bits/ipc.h
index 47df305e1c..bd8601622e 100644
--- a/sysdeps/gnu/bits/ipc.h
+++ b/sysdeps/gnu/bits/ipc.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1995-2021 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/gnu/bits/msq.h b/sysdeps/gnu/bits/msq.h
index 4045091b70..b943e69fa0 100644
--- a/sysdeps/gnu/bits/msq.h
+++ b/sysdeps/gnu/bits/msq.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1995-2021 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/gnu/bits/sem.h b/sysdeps/gnu/bits/sem.h
index c2914d3154..c2300b7c8b 100644
--- a/sysdeps/gnu/bits/sem.h
+++ b/sysdeps/gnu/bits/sem.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1995-2021 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/gnu/bits/shm.h b/sysdeps/gnu/bits/shm.h
index 240272d220..77b154221e 100644
--- a/sysdeps/gnu/bits/shm.h
+++ b/sysdeps/gnu/bits/shm.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1995-2020 Free Software Foundation, Inc.
+/* Copyright (C) 1995-2021 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/gnu/bits/utmpx.h b/sysdeps/gnu/bits/utmpx.h
index dfd55bfcc3..c859c5b900 100644
--- a/sysdeps/gnu/bits/utmpx.h
+++ b/sysdeps/gnu/bits/utmpx.h
@@ -1,5 +1,5 @@
 /* Structures and definitions for the user accounting database.  GNU version.
-   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/sysdeps/gnu/getutmp.c b/sysdeps/gnu/getutmp.c
index 95a9a4b354..4ce9d65ce0 100644
--- a/sysdeps/gnu/getutmp.c
+++ b/sysdeps/gnu/getutmp.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.
 
    The GNU C Library is free software; you can redistribute it and/or
diff --git a/sysdeps/gnu/glob-lstat-compat.c b/sysdeps/gnu/glob-lstat-compat.c
index 0624fad800..128f84c07c 100644
--- a/sysdeps/gnu/glob-lstat-compat.c
+++ b/sysdeps/gnu/glob-lstat-compat.c
@@ -1,6 +1,6 @@
 /* Compat glob which does not use gl_lstat for GLOB_ALTDIRFUNC.
    GNU version
-   Copyright (C) 2017-2020 Free Software Foundation, Inc.
+   Copyright (C) 2017-2021 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/gnu/glob64-lstat-compat.c b/sysdeps/gnu/glob64-lstat-compat.c
index ac1fe1496a..6764f1d062 100644
--- a/sysdeps/gnu/glob64-lstat-compat.c
+++ b/sysdeps/gnu/glob64-lstat-compat.c
@@ -1,6 +1,6 @@
 /* Compat glob which does not use gl_lstat for GLOB_ALTDIRFUNC.
    GNU version
-   Copyright (C) 2017-2020 Free Software Foundation, Inc.
+   Copyright (C) 2017-2021 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/gnu/ifaddrs.c b/sysdeps/gnu/ifaddrs.c
index 412be33875..e74422586b 100644
--- a/sysdeps/gnu/ifaddrs.c
+++ b/sysdeps/gnu/ifaddrs.c
@@ -1,5 +1,5 @@
 /* getifaddrs -- get names and addresses of all network interfaces
-   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
diff --git a/sysdeps/gnu/ldsodefs.h b/sysdeps/gnu/ldsodefs.h
index c96d0e2fbe..ad07a6a532 100644
--- a/sysdeps/gnu/ldsodefs.h
+++ b/sysdeps/gnu/ldsodefs.h
@@ -1,5 +1,5 @@
 /* Run-time dynamic linker data structures for loaded ELF shared objects.  GNU.
-   Copyright (C) 2001-2020 Free Software Foundation, Inc.
+   Copyright (C) 2001-2021 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/gnu/net/if.h b/sysdeps/gnu/net/if.h
index e587a5ce59..61e6bc2527 100644
--- a/sysdeps/gnu/net/if.h
+++ b/sysdeps/gnu/net/if.h
@@ -1,5 +1,5 @@
 /* net/if.h -- declarations for inquiring about network interfaces
-   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/sysdeps/gnu/netinet/ip_icmp.h b/sysdeps/gnu/netinet/ip_icmp.h
index 0a4875e7d4..5db7ac7c37 100644
--- a/sysdeps/gnu/netinet/ip_icmp.h
+++ b/sysdeps/gnu/netinet/ip_icmp.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/sysdeps/gnu/netinet/udp.h b/sysdeps/gnu/netinet/udp.h
index 51d584629c..9062fc324f 100644
--- a/sysdeps/gnu/netinet/udp.h
+++ b/sysdeps/gnu/netinet/udp.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/sysdeps/gnu/sys/mtio.h b/sysdeps/gnu/sys/mtio.h
index 56cfcf13d0..fb17e873fd 100644
--- a/sysdeps/gnu/sys/mtio.h
+++ b/sysdeps/gnu/sys/mtio.h
@@ -1,5 +1,5 @@
 /* Structures and definitions for magnetic tape I/O control commands.
-   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/gnu/unwind-resume.c b/sysdeps/gnu/unwind-resume.c
index 42593c3f61..09533d6992 100644
--- a/sysdeps/gnu/unwind-resume.c
+++ b/sysdeps/gnu/unwind-resume.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
+/* Copyright (C) 2003-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jakub Jelinek <jakub@redhat.com>.
 
diff --git a/sysdeps/gnu/updwtmp.c b/sysdeps/gnu/updwtmp.c
index 044091b77c..a1cb93d75d 100644
--- a/sysdeps/gnu/updwtmp.c
+++ b/sysdeps/gnu/updwtmp.c
@@ -1,4 +1,4 @@
-/* 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.
    Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1998.
 
diff --git a/sysdeps/gnu/utmp_file.c b/sysdeps/gnu/utmp_file.c
index 25ceaa897c..696fb38fa8 100644
--- a/sysdeps/gnu/utmp_file.c
+++ b/sysdeps/gnu/utmp_file.c
@@ -1,4 +1,4 @@
-/* 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.
    Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1998.
 
diff --git a/sysdeps/gnu/utmpx.h b/sysdeps/gnu/utmpx.h
index f50a0dbeb9..b9cab830f5 100644
--- a/sysdeps/gnu/utmpx.h
+++ b/sysdeps/gnu/utmpx.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