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 9cf34c8..36c67fb 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 47df305..bd86016 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 4045091..b943e69 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 c2914d3..c2300b7 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 240272d..77b1542 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 dfd55bf..c859c5b 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 95a9a4b..4ce9d65 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 0624fad..128f84c 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 ac1fe14..6764f1d 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 412be33..e744225 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 c96d0e2..ad07a6a 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 e587a5c..61e6bc2 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 0a4875e..5db7ac7 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 51d5846..9062fc3 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 56cfcf1..fb17e87 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 42593c3..09533d6 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 044091b..a1cb93d 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 25ceaa8..696fb38 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 f50a0db..b9cab83 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