Update ignored files for the latest version of Gnulib

NEWS

@@ -25,14 +25,15 @@ __ https://www.zap.org.au/
 Version 7.17 (not yet released)
 -------------------------------
 
-Updated the minimum version of GNU Autoconf required, giving the option
-of compiling with C17 or C11 instead of C99.
-
 Updated the Brazilian Portuguese, Norwegian Bokmål, Swedish, French,
 Esperanto, Serbian, German and English translations (in that order), with
 thanks to Rafael Fontenelle, Johnny A. Solbu, Anders Jonsson, Frédéric
 Marchal, Felipe Castro, Мирослав Николић and Roland Illig respectively.
 
+Updated the minimum version of GNU Autoconf required, giving the option
+of compiling with C17 or C11 instead of C99.  Updated to the latest
+snapshot of the Gnulib GNU Portability Library.
+
 
 Version 7.16 (19th January, 2021)
 ---------------------------------

lib/.gitignore

@@ -11,6 +11,7 @@ Makefile.am
 /config.charset
 /crc.c
 /crc.h
+/free.c
 /getopt-cdefs.in.h
 /getopt-core.h
 /getopt-ext.h
@@ -65,6 +66,8 @@ Makefile.am
 /stdbool.in.h
 /stddef.in.h
 /stdint.in.h
+/stdio-read.c
+/stdio-write.c
 /stdio.in.h
 /stdlib.in.h
 /str-two-way.h

m4/.gitignore

@@ -10,6 +10,7 @@
 /extensions.m4
 /extern-inline.m4
 /fcntl-o.m4
+/free.m4
 /getopt.m4
 /gettext.m4
 /gettimeofday.m4
@@ -84,6 +85,7 @@
 /time_h.m4
 /uintmax_t.m4
 /unistd_h.m4
+/vararrays.m4
 /visibility.m4
 /warn-on-use.m4
 /wchar_h.m4

m4/gnulib-cache.m4

@@ -1,8 +1,8 @@
-# Copyright (C) 2002-2021 Free Software Foundation, Inc.
+# Copyright (C) 2002-2022 Free Software Foundation, Inc.
 #
 # This file is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3 of the License, or
+# the Free Software Foundation, either version 3 of the License, or
 # (at your option) any later version.
 #
 # This file is distributed in the hope that it will be useful,