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

29 files changed, 29 insertions, 29 deletions

diff --git a/socket/Makefile b/socket/Makefile
index 125c042..600891d 100644
--- a/socket/Makefile
+++ b/socket/Makefile
@@ -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/socket/accept.c b/socket/accept.c
index 2f29381..59f5921 100644
--- a/socket/accept.c
+++ b/socket/accept.c
@@ -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/socket/accept4.c b/socket/accept4.c
index 711f58c..4b257fd 100644
--- a/socket/accept4.c
+++ b/socket/accept4.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2008-2020 Free Software Foundation, Inc.
+/* Copyright (C) 2008-2021 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/socket/bind.c b/socket/bind.c
index 5b9bee0..d4155b1 100644
--- a/socket/bind.c
+++ b/socket/bind.c
@@ -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/socket/bits/socket2.h b/socket/bits/socket2.h
index 05418ba..9c8ac69 100644
--- a/socket/bits/socket2.h
+++ b/socket/bits/socket2.h
@@ -1,5 +1,5 @@
 /* Checking macros for socket functions.
-   Copyright (C) 2005-2020 Free Software Foundation, Inc.
+   Copyright (C) 2005-2021 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/socket/connect.c b/socket/connect.c
index f63b597..9bf81b3 100644
--- a/socket/connect.c
+++ b/socket/connect.c
@@ -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/socket/getpeername.c b/socket/getpeername.c
index b2c59ce..e449a1e 100644
--- a/socket/getpeername.c
+++ b/socket/getpeername.c
@@ -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/socket/getsockname.c b/socket/getsockname.c
index e54fac4..7bfdbae 100644
--- a/socket/getsockname.c
+++ b/socket/getsockname.c
@@ -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/socket/getsockopt.c b/socket/getsockopt.c
index 4300130..f82b4b5 100644
--- a/socket/getsockopt.c
+++ b/socket/getsockopt.c
@@ -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/socket/isfdtype.c b/socket/isfdtype.c
index 170173e..3deeac1 100644
--- a/socket/isfdtype.c
+++ b/socket/isfdtype.c
@@ -1,5 +1,5 @@
 /* isfdtype - Determine whether descriptor has given property.  Stub 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/socket/listen.c b/socket/listen.c
index 9f4764c..f5821f5 100644
--- a/socket/listen.c
+++ b/socket/listen.c
@@ -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/socket/opensock.c b/socket/opensock.c
index 4c65940..37148d4 100644
--- a/socket/opensock.c
+++ b/socket/opensock.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/socket/recv.c b/socket/recv.c
index 260a62d..56949b7 100644
--- a/socket/recv.c
+++ b/socket/recv.c
@@ -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/socket/recvfrom.c b/socket/recvfrom.c
index 2fac2f3..cc83964 100644
--- a/socket/recvfrom.c
+++ b/socket/recvfrom.c
@@ -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/socket/recvmmsg.c b/socket/recvmmsg.c
index 174bff8..dd72fe3 100644
--- a/socket/recvmmsg.c
+++ b/socket/recvmmsg.c
@@ -1,5 +1,5 @@
 /* Receive multiple messages on a socket.  Stub version.
-   Copyright (C) 2010-2020 Free Software Foundation, Inc.
+   Copyright (C) 2010-2021 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/socket/recvmsg.c b/socket/recvmsg.c
index e6e540e..36fcf5b 100644
--- a/socket/recvmsg.c
+++ b/socket/recvmsg.c
@@ -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/socket/sa_len.c b/socket/sa_len.c
index aefb03e..e67d9c3 100644
--- a/socket/sa_len.c
+++ b/socket/sa_len.c
@@ -1,5 +1,5 @@
 /* Helper for SA_LEN macro.
-   Copyright (C) 2013-2020 Free Software Foundation, Inc.
+   Copyright (C) 2013-2021 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/socket/send.c b/socket/send.c
index ad53a9e..2fbf3af 100644
--- a/socket/send.c
+++ b/socket/send.c
@@ -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/socket/sendmmsg.c b/socket/sendmmsg.c
index 04cdac1..bf3bc80 100644
--- a/socket/sendmmsg.c
+++ b/socket/sendmmsg.c
@@ -1,5 +1,5 @@
 /* Send multiple messages on a socket.  Stub version.
-   Copyright (C) 2011-2020 Free Software Foundation, Inc.
+   Copyright (C) 2011-2021 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/socket/sendmsg.c b/socket/sendmsg.c
index b8d2ddd..b8be1fb 100644
--- a/socket/sendmsg.c
+++ b/socket/sendmsg.c
@@ -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/socket/sendto.c b/socket/sendto.c
index ca9b480..c5557ce 100644
--- a/socket/sendto.c
+++ b/socket/sendto.c
@@ -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/socket/setsockopt.c b/socket/setsockopt.c
index 4cb69ab..2440670 100644
--- a/socket/setsockopt.c
+++ b/socket/setsockopt.c
@@ -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/socket/shutdown.c b/socket/shutdown.c
index e0d6a15..39e4939 100644
--- a/socket/shutdown.c
+++ b/socket/shutdown.c
@@ -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/socket/sockatmark.c b/socket/sockatmark.c
index e5d736a..21fe95e 100644
--- a/socket/sockatmark.c
+++ b/socket/sockatmark.c
@@ -1,4 +1,4 @@
-/* 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/socket/socket.c b/socket/socket.c
index ee0b953..f811e4b 100644
--- a/socket/socket.c
+++ b/socket/socket.c
@@ -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/socket/socketpair.c b/socket/socketpair.c
index c1fabbb..ccb7759 100644
--- a/socket/socketpair.c
+++ b/socket/socketpair.c
@@ -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/socket/sys/socket.h b/socket/sys/socket.h
index 7780c00..949851a 100644
--- a/socket/sys/socket.h
+++ b/socket/sys/socket.h
@@ -1,5 +1,5 @@
 /* Declarations of socket constants, types, and functions.
-   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/socket/sys/un.h b/socket/sys/un.h
index 95400f7..02224f9 100644
--- a/socket/sys/un.h
+++ b/socket/sys/un.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/socket/tst-accept4.c b/socket/tst-accept4.c
index 8e1d7fd..6d2f3df 100644
--- a/socket/tst-accept4.c
+++ b/socket/tst-accept4.c
@@ -1,5 +1,5 @@
 /* Test the accept4 function with differing flags arguments.
-   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