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

48 files changed, 48 insertions, 48 deletions

diff --git a/manual/Makefile b/manual/Makefile
index c61e11dcd7..e83444341e 100644
--- a/manual/Makefile
+++ b/manual/Makefile
@@ -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/manual/check-safety.sh b/manual/check-safety.sh
index cbc0634569..17a31281e0 100644
--- a/manual/check-safety.sh
+++ b/manual/check-safety.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# Copyright 2014-2020 Free Software Foundation, Inc.
+# Copyright 2014-2021 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/manual/examples/add.c b/manual/examples/add.c
index 20d64d4924..ebc9d265b2 100644
--- a/manual/examples/add.c
+++ b/manual/examples/add.c
@@ -1,5 +1,5 @@
 /* Example of a Variadic Function
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/argp-ex1.c b/manual/examples/argp-ex1.c
index a13dd4142f..573fb323dd 100644
--- a/manual/examples/argp-ex1.c
+++ b/manual/examples/argp-ex1.c
@@ -1,5 +1,5 @@
 /* Argp example #1 -- a minimal program using argp
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/argp-ex2.c b/manual/examples/argp-ex2.c
index a8055db4a5..eedd2e3fc8 100644
--- a/manual/examples/argp-ex2.c
+++ b/manual/examples/argp-ex2.c
@@ -1,5 +1,5 @@
 /* Argp example #2 -- a pretty minimal program using argp
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/argp-ex3.c b/manual/examples/argp-ex3.c
index 42b5cb4b9b..9401aae91b 100644
--- a/manual/examples/argp-ex3.c
+++ b/manual/examples/argp-ex3.c
@@ -1,5 +1,5 @@
 /* Argp example #3 -- a program with options and arguments using argp
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/argp-ex4.c b/manual/examples/argp-ex4.c
index 84fdaed57a..41b0f71371 100644
--- a/manual/examples/argp-ex4.c
+++ b/manual/examples/argp-ex4.c
@@ -1,5 +1,5 @@
 /* Argp example #4 -- a program with somewhat more complicated options
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/atexit.c b/manual/examples/atexit.c
index 02c9784d66..62e30b235a 100644
--- a/manual/examples/atexit.c
+++ b/manual/examples/atexit.c
@@ -1,5 +1,5 @@
 /* Cleanups on Exit
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/db.c b/manual/examples/db.c
index b061fced84..f2e78b890a 100644
--- a/manual/examples/db.c
+++ b/manual/examples/db.c
@@ -1,5 +1,5 @@
 /* User and Group Database Example
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/dir.c b/manual/examples/dir.c
index a7bf53fff8..df4e9a3caa 100644
--- a/manual/examples/dir.c
+++ b/manual/examples/dir.c
@@ -1,5 +1,5 @@
 /* Simple Program to List a Directory
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/dir2.c b/manual/examples/dir2.c
index f314dde91f..547906181d 100644
--- a/manual/examples/dir2.c
+++ b/manual/examples/dir2.c
@@ -1,5 +1,5 @@
 /* Simple Program to List a Directory, Mark II
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/execinfo.c b/manual/examples/execinfo.c
index 3cedf7f35f..29a3fafdb4 100644
--- a/manual/examples/execinfo.c
+++ b/manual/examples/execinfo.c
@@ -1,5 +1,5 @@
 /* Obtain a backtrace and print it.
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/filecli.c b/manual/examples/filecli.c
index e811c94665..16a8659c81 100644
--- a/manual/examples/filecli.c
+++ b/manual/examples/filecli.c
@@ -1,5 +1,5 @@
 /* Example of Reading Datagrams
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/filesrv.c b/manual/examples/filesrv.c
index f38f54743b..d6ea33d472 100644
--- a/manual/examples/filesrv.c
+++ b/manual/examples/filesrv.c
@@ -1,5 +1,5 @@
 /* Datagram Socket Example
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/fmtmsgexpl.c b/manual/examples/fmtmsgexpl.c
index a732227756..a862d84457 100644
--- a/manual/examples/fmtmsgexpl.c
+++ b/manual/examples/fmtmsgexpl.c
@@ -1,5 +1,5 @@
 /* How to use fmtmsg and addseverity.
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/genpass.c b/manual/examples/genpass.c
index 5bac269389..58c605de3b 100644
--- a/manual/examples/genpass.c
+++ b/manual/examples/genpass.c
@@ -1,5 +1,5 @@
 /* Encrypting Passwords
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/inetcli.c b/manual/examples/inetcli.c
index a5a715b179..6040b26c92 100644
--- a/manual/examples/inetcli.c
+++ b/manual/examples/inetcli.c
@@ -1,5 +1,5 @@
 /* Byte Stream Socket Example
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/inetsrv.c b/manual/examples/inetsrv.c
index 391a462017..698041e641 100644
--- a/manual/examples/inetsrv.c
+++ b/manual/examples/inetsrv.c
@@ -1,5 +1,5 @@
 /* Byte Stream Connection Server Example
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/isockad.c b/manual/examples/isockad.c
index efdc52ef3e..84eba1c4e8 100644
--- a/manual/examples/isockad.c
+++ b/manual/examples/isockad.c
@@ -1,5 +1,5 @@
 /* Internet Socket Example using sockaddr_in.
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/longopt.c b/manual/examples/longopt.c
index 40bad26d31..b26c2f804f 100644
--- a/manual/examples/longopt.c
+++ b/manual/examples/longopt.c
@@ -1,5 +1,5 @@
 /* Example of Parsing Long Options with getopt_long.
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/memopen.c b/manual/examples/memopen.c
index e840828f97..40f18dfcc1 100644
--- a/manual/examples/memopen.c
+++ b/manual/examples/memopen.c
@@ -1,5 +1,5 @@
 /* String Streams
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/memstrm.c b/manual/examples/memstrm.c
index 3c427f90f1..a36a1bc1c6 100644
--- a/manual/examples/memstrm.c
+++ b/manual/examples/memstrm.c
@@ -1,5 +1,5 @@
 /* open_memstream example.
-   Copyright (C) 1991-2020 Free Software Foundation, Inc.
+   Copyright (C) 1991-2021 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
diff --git a/manual/examples/mkdirent.c b/manual/examples/mkdirent.c
index 0a76076b76..47431b37bb 100644
--- a/manual/examples/mkdirent.c
+++ b/manual/examples/mkdirent.c
@@ -1,5 +1,5 @@
 /* Example for creating a struct dirent object for use with glob.
-   Copyright (C) 2016-2020 Free Software Fo