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

18 files changed, 18 insertions, 18 deletions

diff --git a/argp/Makefile b/argp/Makefile
index 1f9b074bed..90023fba16 100644
--- a/argp/Makefile
+++ b/argp/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/argp/argp-ba.c b/argp/argp-ba.c
index 9b983852fd..c13372d8d3 100644
--- a/argp/argp-ba.c
+++ b/argp/argp-ba.c
@@ -1,5 +1,5 @@
 /* Default definition for ARGP_PROGRAM_BUG_ADDRESS.
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-eexst.c b/argp/argp-eexst.c
index 2e08b09f21..795e3121ec 100644
--- a/argp/argp-eexst.c
+++ b/argp/argp-eexst.c
@@ -1,5 +1,5 @@
 /* Default definition for ARGP_ERR_EXIT_STATUS
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-fmtstream.c b/argp/argp-fmtstream.c
index d915b9ad67..a0146c144b 100644
--- a/argp/argp-fmtstream.c
+++ b/argp/argp-fmtstream.c
@@ -1,5 +1,5 @@
 /* Word-wrapping and line-truncating streams
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-fmtstream.h b/argp/argp-fmtstream.h
index 21f21ae88c..5ebd0d0f0d 100644
--- a/argp/argp-fmtstream.h
+++ b/argp/argp-fmtstream.h
@@ -1,5 +1,5 @@
 /* Word-wrapping and line-truncating streams.
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-fs-xinl.c b/argp/argp-fs-xinl.c
index 0da32de31d..b3eddb3283 100644
--- a/argp/argp-fs-xinl.c
+++ b/argp/argp-fs-xinl.c
@@ -1,5 +1,5 @@
 /* Real definitions for extern inline functions in argp-fmtstream.h
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-help.c b/argp/argp-help.c
index 2bcd6549fd..15c5fd237b 100644
--- a/argp/argp-help.c
+++ b/argp/argp-help.c
@@ -1,5 +1,5 @@
 /* Hierarchial argument parsing help output
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-namefrob.h b/argp/argp-namefrob.h
index d21cefa4a4..cda2aca931 100644
--- a/argp/argp-namefrob.h
+++ b/argp/argp-namefrob.h
@@ -1,5 +1,5 @@
 /* Name frobnication for compiling argp outside of glibc
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-parse.c b/argp/argp-parse.c
index 14f9387668..45a5fdba62 100644
--- a/argp/argp-parse.c
+++ b/argp/argp-parse.c
@@ -1,5 +1,5 @@
 /* Hierarchial argument parsing, layered over getopt
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-pv.c b/argp/argp-pv.c
index 6cc96f0b70..6ea8ce5fba 100644
--- a/argp/argp-pv.c
+++ b/argp/argp-pv.c
@@ -1,5 +1,5 @@
 /* Default definition for ARGP_PROGRAM_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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-pvh.c b/argp/argp-pvh.c
index cb90cbaaa3..ac8cf6ac69 100644
--- a/argp/argp-pvh.c
+++ b/argp/argp-pvh.c
@@ -1,5 +1,5 @@
 /* Default definition for ARGP_PROGRAM_VERSION_HOOK.
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-test.c b/argp/argp-test.c
index f1ab60fd92..0a715576ba 100644
--- a/argp/argp-test.c
+++ b/argp/argp-test.c
@@ -1,5 +1,5 @@
 /* Test program for argp argument parser
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp-xinl.c b/argp/argp-xinl.c
index 63ca002359..f68820fc87 100644
--- a/argp/argp-xinl.c
+++ b/argp/argp-xinl.c
@@ -1,5 +1,5 @@
 /* Real definitions for extern inline functions in argp.h
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/argp.h b/argp/argp.h
index 2cbc4dcb1b..5dd382825a 100644
--- a/argp/argp.h
+++ b/argp/argp.h
@@ -1,5 +1,5 @@
 /* Hierarchical argument parsing, layered over getopt.
-   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.
    Written by Miles Bader <miles@gnu.ai.mit.edu>.
 
diff --git a/argp/bits/argp-ldbl.h b/argp/bits/argp-ldbl.h
index dd77a34a93..903b06f1cd 100644
--- a/argp/bits/argp-ldbl.h
+++ b/argp/bits/argp-ldbl.h
@@ -1,5 +1,5 @@
 /* Redirections for argp functions for -mlong-double-64.
-   Copyright (C) 2019-2020 Free Software Foundation, Inc.
+   Copyright (C) 2019-2021 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/argp/tst-argp1.c b/argp/tst-argp1.c
index 23678d84e4..f1637c2f0a 100644
--- a/argp/tst-argp1.c
+++ b/argp/tst-argp1.c
@@ -1,4 +1,4 @@
-/* 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.
    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
 
diff --git a/argp/tst-argp2.c b/argp/tst-argp2.c
index 34b4e8a5c2..2c74fe5ec4 100644
--- a/argp/tst-argp2.c
+++ b/argp/tst-argp2.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2007-2020 Free Software Foundation, Inc.
+/* Copyright (C) 2007-2021 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Jakub Jelinek <jakub@redhat.com>, 2007.
 
diff --git a/argp/tst-ldbl-argp.c b/argp/tst-ldbl-argp.c
index b16d58b627..9b39dbf680 100644
--- a/argp/tst-ldbl-argp.c
+++ b/argp/tst-ldbl-argp.c
@@ -1,5 +1,5 @@
 /* Testing of long double conversions in argp.h functions.
-   Copyright (C) 2018-2020 Free Software Foundation, Inc.
+   Copyright (C) 2018-2021 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