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 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines

8 files changed, 8 insertions, 8 deletions

diff --git a/hesiod/Makefile b/hesiod/Makefile
index 7d1b1f9a63..ae2c8ae4d7 100644
--- a/hesiod/Makefile
+++ b/hesiod/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 1997-2021 Free Software Foundation, Inc.
+# Copyright (C) 1997-2022 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/hesiod/hesiod.c b/hesiod/hesiod.c
index ee3e2648eb..f3a4855495 100644
--- a/hesiod/hesiod.c
+++ b/hesiod/hesiod.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2022 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/hesiod/hesiod.h b/hesiod/hesiod.h
index 39707a8772..1054c5fb9c 100644
--- a/hesiod/hesiod.h
+++ b/hesiod/hesiod.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2022 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/hesiod/hesiod_p.h b/hesiod/hesiod_p.h
index 81a9c061a1..b4cb9939fd 100644
--- a/hesiod/hesiod_p.h
+++ b/hesiod/hesiod_p.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2022 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/hesiod/nss_hesiod/hesiod-grp.c b/hesiod/nss_hesiod/hesiod-grp.c
index 828c69b2e6..f28d31bcd5 100644
--- a/hesiod/nss_hesiod/hesiod-grp.c
+++ b/hesiod/nss_hesiod/hesiod-grp.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2022 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/hesiod/nss_hesiod/hesiod-proto.c b/hesiod/nss_hesiod/hesiod-proto.c
index de2805d29c..31017f5c69 100644
--- a/hesiod/nss_hesiod/hesiod-proto.c
+++ b/hesiod/nss_hesiod/hesiod-proto.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2022 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/hesiod/nss_hesiod/hesiod-pwd.c b/hesiod/nss_hesiod/hesiod-pwd.c
index 91182e3e93..98796b241d 100644
--- a/hesiod/nss_hesiod/hesiod-pwd.c
+++ b/hesiod/nss_hesiod/hesiod-pwd.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2022 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/hesiod/nss_hesiod/hesiod-service.c b/hesiod/nss_hesiod/hesiod-service.c
index 64e7325ef0..0336443ba8 100644
--- a/hesiod/nss_hesiod/hesiod-service.c
+++ b/hesiod/nss_hesiod/hesiod-service.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2021 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2022 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