build-sys: routine update

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

Makefile.am

@@ -1,7 +1,6 @@
 ## Makefile.am -- Process this file with automake to produce Makefile.in
 
 AUTOMAKE_OPTIONS = gnu
-ACLOCAL_AMFLAGS = -I m4
 
 EXTRA_DIST = \
 	.version \

bootstrap

@@ -1,10 +1,10 @@
 #! /bin/sh
 # Print a version string.
-scriptversion=2019-01-04.17; # UTC
+scriptversion=2022-06-04.00; # UTC
 
 # Bootstrap this package from checked-out sources.
 
-# Copyright (C) 2003-2020 Free Software Foundation, Inc.
+# Copyright (C) 2003-2022 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 as published by
@@ -47,7 +47,7 @@ PERL="${PERL-perl}"
 
 me=$0
 
-default_gnulib_url=git://git.sv.gnu.org/gnulib
+default_gnulib_url=https://git.savannah.gnu.org/git/gnulib.git
 
 usage() {
   cat <<EOF
@@ -71,7 +71,9 @@ Options:
  --no-git                 do not use git to update gnulib.  Requires that
                           --gnulib-srcdir point to a correct gnulib snapshot
  --skip-po                do not download po files
-
+EOF
+  bootstrap_print_option_usage_hook
+  cat <<EOF
 If the file $me.conf exists in the same directory as this script, its
 contents are read as shell variables to configure the bootstrap.
 
@@ -113,6 +115,12 @@ Running without arguments will suffice in most cases.
 EOF
 }
 
+copyright_year=`echo "$scriptversion" | sed -e 's/[^0-9].*//'`
+copyright="Copyright (C) ${copyright_year} Free Software Foundation, Inc.
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+This is free software: you are free to change and redistribute it.
+There is NO WARRANTY, to the extent permitted by law."
+
 # warnf_ FORMAT-STRING ARG1...
 warnf_ ()
 {
@@ -154,6 +162,18 @@ gnulib_files=
 : ${AUTOPOINT=autopoint}
 : ${AUTORECONF=autoreconf}
 
+# A function to be called for each unrecognized option.  Returns 0 if
+# the option in $1 has been processed by the function.  Returns 1 if
+# the option has not been processed by the function.  Override it via
+# your own definition in bootstrap.conf
+
+bootstrap_option_hook() { return 1; }
+
+# A function to be called in order to print the --help information
+# corresponding to user-defined command-line options.
+
+bootstrap_print_option_usage_hook() { :; }
+
 # A function to be called right after gnulib-tool is run.
 # Override it via your own definition in bootstrap.conf.
 bootstrap_post_import_hook() { :; }
@@ -170,7 +190,7 @@ po_download_command_format=\
  https://translationproject.org/latest/%s/"
 
 # Prefer a non-empty tarname (4th argument of AC_INIT if given), else
-# fall back to the package name (1st argument with munging)
+# fall back to the package name (1st argument with munging).
 extract_package_name='
   /^AC_INIT(\[*/{
      s///
@@ -188,8 +208,11 @@ extract_package_name='
      p
   }
 '
-package=$(sed -n "$extract_package_name" configure.ac) \
+package=$(${AUTOCONF:-autoconf} --trace AC_INIT:\$4 configure.ac 2>/dev/null)
-  || die 'cannot find package name in configure.ac'
+if test -z "$package"; then
+  package=$(sed -n "$extract_package_name" configure.ac) \
+      || die 'cannot find package name in configure.ac'
+fi
 gnulib_name=lib$package
 
 build_aux=build-aux
@@ -229,7 +252,7 @@ excluded_files=
 
 # File that should exist in the top directory of a checked out hierarchy,
 # but not in a distribution tarball.
-checkout_only_file=TODO
+checkout_only_file=src/dhcpd-pools.c
 
 # Whether to use copies instead of symlinks.
 copy=false
@@ -291,62 +314,6 @@ find_tool ()
   eval "export $find_tool_envvar"
 }
 
-# Override the default configuration, if necessary.
-# Make sure that bootstrap.conf is sourced from the current directory
-# if we were invoked as "sh bootstrap".
-case "$0" in
-  */*) test -r "$0.conf" && . "$0.conf" ;;
-  *) test -r "$0.conf" && . ./"$0.conf" ;;
-esac
-
-if test "$vc_ignore" = auto; then
-  vc_ignore=
-  test -d .git && vc_ignore=.gitignore
-  test -d CVS && vc_ignore="$vc_ignore .cvsignore"
-fi
-
-if test x"$gnulib_modules$gnulib_files$gnulib_extra_files" = x; then
-  use_gnulib=false
-else
-  use_gnulib=true
-fi
-
-# Translate configuration into internal form.
-
-# Parse options.
-
-for option
-do
-  case $option in
-  --help)
-    usage
-    exit;;
-  --gnulib-srcdir=*)
-    GNULIB_SRCDIR=${option#--gnulib-srcdir=};;
-  --skip-po)
-    SKIP_PO=t;;
-  --force)
-    checkout_only_file=;;
-  --copy)
-    copy=true;;
-  --bootstrap-sync)
-    bootstrap_sync=true;;
-  --no-bootstrap-sync)
-    bootstrap_sync=false;;
-  --no-git)
-    use_git=false;;
-  *)
-    die "$option: unknown option";;
-  esac
-done
-
-$use_git || test -d "$GNULIB_SRCDIR" \
-  || die "Error: --no-git requires --gnulib-srcdir"
-
-if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
-  die "Bootstrapping from a non-checked-out distribution is risky."
-fi
-
 # Strip blank and comment lines to leave significant entries.
 gitignore_entries() {
   sed '/^#/d; /^$/d' "$@"
@@ -388,9 +355,140 @@ insert_vc_ignore() {
   insert_if_absent "$vc_ignore_file" "$pattern"
 }
 
+symlink_to_dir()
+{
+  src=$1/$2
+  dst=${3-$2}
+
+  test -f "$src" && {
+
+    # If the destination directory doesn't exist, create it.
+    # This is required at least for "lib/uniwidth/cjk.h".
+    dst_dir=$(dirname "$dst")
+    if ! test -d "$dst_dir"; then
+      mkdir -p "$dst_dir"
+
+      # If we've just created a directory like lib/uniwidth,
+      # tell version control system(s) it's ignorable.
+      # FIXME: for now, this does only one level
+      parent=$(dirname "$dst_dir")
+      for dot_ig in x $vc_ignore; do
+        test $dot_ig = x && continue
+        ig=$parent/$dot_ig
+        insert_vc_ignore $ig "${dst_dir##*/}"
+      done
+    fi
+
+    if $copy; then
+      {
+        test ! -h "$dst" || {
+          echo "$me: rm -f $dst" &&
+          rm -f "$dst"
+        }
+      } &&
+      test -f "$dst" &&
+      cmp -s "$src" "$dst" || {
+        echo "$me: cp -fp $src $dst" &&
+        cp -fp "$src" "$dst"
+      }
+    else
+      # Leave any existing symlink alone, if it already points to the source,
+      # so that broken build tools that care about symlink times
+      # aren't confused into doing unnecessary builds.  Conversely, if the
+      # existing symlink's timestamp is older than the source, make it afresh,
+      # so that broken tools aren't confused into skipping needed builds.  See
+      # <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00326.html>.
+      test -h "$dst" &&
+      src_ls=$(ls -diL "$src" 2>/dev/null) && set $src_ls && src_i=$1 &&
+      dst_ls=$(ls -diL "$dst" 2>/dev/null) && set $dst_ls && dst_i=$1 &&
+      test "$src_i" = "$dst_i" &&
+      both_ls=$(ls -dt "$src" "$dst") &&
+      test "X$both_ls" = "X$dst$nl$src" || {
+        dot_dots=
+        case $src in
+        /*) ;;
+        *)
+          case /$dst/ in
+          *//* | */../* | */./* | /*/*/*/*/*/)
+             die "invalid symlink calculation: $src -> $dst";;
+          /*/*/*/*/)    dot_dots=../../../;;
+          /*/*/*/)      dot_dots=../../;;
+          /*/*/)        dot_dots=../;;
+          esac;;
+        esac
+
+        echo "$me: ln -fs $dot_dots$src $dst" &&
+        ln -fs "$dot_dots$src" "$dst"
+      }
+    fi
+  }
+}
+
+# Override the default configuration, if necessary.
+# Make sure that bootstrap.conf is sourced from the current directory
+# if we were invoked as "sh bootstrap".
+case "$0" in
+  */*) test -r "$0.conf" && . "$0.conf" ;;
+  *) test -r "$0.conf" && . ./"$0.conf" ;;
+esac
+
+if test "$vc_ignore" = auto; then
+  vc_ignore=
+  test -d .git && vc_ignore=.gitignore
+  test -d CVS && vc_ignore="$vc_ignore .cvsignore"
+fi
+
+if test x"$gnulib_modules$gnulib_files$gnulib_extra_files" = x; then
+  use_gnulib=false
+else
+  use_gnulib=true
+fi
+
+# Translate configuration into internal form.
+
+# Parse options.
+
+for option
+do
+  case $option in
+  --help)
+    usage
+    exit;;
+  --version)
+    set -e
+    echo "bootstrap $scriptversion"
+    echo "$copyright"
+    exit 0
+    ;;
+  --gnulib-srcdir=*)
+    GNULIB_SRCDIR=${option#--gnulib-srcdir=};;
+  --skip-po)
+    SKIP_PO=t;;
+  --force)
+    checkout_only_file=;;
+  --copy)
+    copy=true;;
+  --bootstrap-sync)
+    bootstrap_sync=true;;
+  --no-bootstrap-sync)
+    bootstrap_sync=false;;
+  --no-git)
+    use_git=false;;
+  *)
+    bootstrap_option_hook $option || die "$option: unknown option";;
+  esac
+done
+
+$use_git || test -d "$GNULIB_SRCDIR" \
+  || die "Error: --no-git requires --gnulib-srcdir"
+
+if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
+  die "Bootstrapping from a non-checked-out distribution is risky."
+fi
+
 # Die if there is no AC_CONFIG_AUX_DIR($build_aux) line in configure.ac.
 found_aux_dir=no
-grep '^[	 ]*AC_CONFIG_AUX_DIR(\['"$build_aux"'\])' configure.ac \
+grep '^[	 ]*AC_CONFIG_AUX_DIR(\['"$build_aux"'])' configure.ac \
     >/dev/null && found_aux_dir=yes
 grep '^[	 ]*AC_CONFIG_AUX_DIR('"$build_aux"')' configure.ac \
     >/dev/null && found_aux_dir=yes
@@ -666,9 +764,26 @@ if $use_gnulib; then
       shallow=
       if test -z "$GNULIB_REVISION"; then
         git clone -h 2>&1 | grep -- --depth > /dev/null && shallow='--depth 2'
+        git clone $shallow ${GNULIB_URL:-$default_gnulib_url} "$gnulib_path" \
+          || cleanup_gnulib
+      else
+        git fetch -h 2>&1 | grep -- --depth > /dev/null && shallow='--depth 2'
+        mkdir -p "$gnulib_path"
+        # Only want a shallow checkout of $GNULIB_REVISION, but git does not
+        # support cloning by commit hash. So attempt a shallow fetch by commit
+        # hash to minimize the amount of data downloaded and changes needed to
+        # be processed, which can drastically reduce download and processing
+        # time for checkout. If the fetch by commit fails, a shallow fetch can
+        # not be performed because we do not know what the depth of the commit
+        # is without fetching all commits. So fallback to fetching all commits.
+        git -C "$gnulib_path" init
+        git -C "$gnulib_path" remote add origin \
+            ${GNULIB_URL:-$default_gnulib_url}
+        git -C "$gnulib_path" fetch $shallow origin "$GNULIB_REVISION" \
+          || git -C "$gnulib_path" fetch origin \
+          || cleanup_gnulib
+        git -C "$gnulib_path" reset --hard FETCH_HEAD
       fi
-      git clone $shallow ${GNULIB_URL:-$default_gnulib_url} "$gnulib_path" \
-        || cleanup_gnulib
 
       trap - 1 2 13 15
     fi
@@ -785,75 +900,6 @@ case $SKIP_PO in
   fi;;
 esac
 
-symlink_to_dir()
-{
-  src=$1/$2
-  dst=${3-$2}
-
-  test -f "$src" && {
-
-    # If the destination directory doesn't exist, create it.
-    # This is required at least for "lib/uniwidth/cjk.h".
-    dst_dir=$(dirname "$dst")
-    if ! test -d "$dst_dir"; then
-      mkdir -p "$dst_dir"
-
-      # If we've just created a directory like lib/uniwidth,
-      # tell version control system(s) it's ignorable.
-      # FIXME: for now, this does only one level
-      parent=$(dirname "$dst_dir")
-      for dot_ig in x $vc_ignore; do
-        test $dot_ig = x && continue
-        ig=$parent/$dot_ig
-        insert_vc_ignore $ig "${dst_dir##*/}"
-      done
-    fi
-
-    if $copy; then
-      {
-        test ! -h "$dst" || {
-          echo "$me: rm -f $dst" &&
-          rm -f "$dst"
-        }
-      } &&
-      test -f "$dst" &&
-      cmp -s "$src" "$dst" || {
-        echo "$me: cp -fp $src $dst" &&
-        cp -fp "$src" "$dst"
-      }
-    else
-      # Leave any existing symlink alone, if it already points to the source,
-      # so that broken build tools that care about symlink times
-      # aren't confused into doing unnecessary builds.  Conversely, if the
-      # existing symlink's timestamp is older than the source, make it afresh,
-      # so that broken tools aren't confused into skipping needed builds.  See
-      # <https://lists.gnu.org/r/bug-gnulib/2011-05/msg00326.html>.
-      test -h "$dst" &&
-      src_ls=$(ls -diL "$src" 2>/dev/null) && set $src_ls && src_i=$1 &&
-      dst_ls=$(ls -diL "$dst" 2>/dev/null) && set $dst_ls && dst_i=$1 &&
-      test "$src_i" = "$dst_i" &&
-      both_ls=$(ls -dt "$src" "$dst") &&
-      test "X$both_ls" = "X$dst$nl$src" || {
-        dot_dots=
-        case $src in
-        /*) ;;
-        *)
-          case /$dst/ in
-          *//* | */../* | */./* | /*/*/*/*/*/)
-             die "invalid symlink calculation: $src -> $dst";;
-          /*/*/*/*/)    dot_dots=../../../;;
-          /*/*/*/)      dot_dots=../../;;
-          /*/*/)        dot_dots=../;;
-          esac;;
-        esac
-
-        echo "$me: ln -fs $dot_dots$src $dst" &&
-        ln -fs "$dot_dots$src" "$dst"
-      }
-    fi
-  }
-}
-
 version_controlled_file() {
   parent=$1
   file=$2
@@ -971,7 +1017,7 @@ bootstrap_post_import_hook \
 # Uninitialized submodules are listed with an initial dash.
 if $use_git && git submodule | grep '^-' >/dev/null; then
   die "some git submodules are not initialized. "     \
-      "Run 'git submodule init' and bootstrap again."
+      "Run 'git submodule update --init' and bootstrap again."
 fi
 
 # Remove any dangling symlink matching "*.m4" or "*.[ch]" in some
@@ -1065,7 +1111,7 @@ bootstrap_epilogue
 
 echo "$0: done.  Now you can run './configure'."
 
-# Local variables:
+# Local Variables:
 # eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"

bootstrap.conf

@@ -1,10 +1,10 @@
 # Bootstrap configuration.
 
-# Copyright (C) 2006-2020 Free Software Foundation, Inc.
+# Copyright (C) 2006-2022 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 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 program is distributed in the hope that it will be useful,
@@ -64,7 +64,7 @@ XGETTEXT_OPTIONS=$XGETTEXT_OPTIONS'\\\
 gettext_external=0
 grep '^[	 ]*AM_GNU_GETTEXT(external\>' configure.ac > /dev/null &&
   gettext_external=1
-grep '^[	 ]*AM_GNU_GETTEXT(\[external\]' configure.ac > /dev/null &&
+grep '^[	 ]*AM_GNU_GETTEXT(\[external]' configure.ac > /dev/null &&
   gettext_external=1
 
 if test $gettext_external = 1; then

build-aux/git-version-gen

@@ -1,12 +1,12 @@
 #!/bin/sh
 # Print a version string.
-scriptversion=2012-12-31.23; # UTC
+scriptversion=2022-01-27.18; # UTC
 
-# Copyright (C) 2007-2013 Free Software Foundation, Inc.
+# Copyright (C) 2007-2022 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 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 program is distributed in the hope that it will be useful,
@@ -15,9 +15,9 @@ scriptversion=2012-12-31.23; # UTC
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-# This script is derived from GIT-VERSION-GEN from GIT: http://git.or.cz/.
+# This script is derived from GIT-VERSION-GEN from GIT: https://git-scm.com/.
 # It may be run two ways:
 # - from a git repository in which the "git describe" command below
 #   produces useful output (thus requiring at least one signed tag)
@@ -65,19 +65,21 @@ scriptversion=2012-12-31.23; # UTC
 # EXTRA_DIST = $(top_srcdir)/.version
 # BUILT_SOURCES = $(top_srcdir)/.version
 # $(top_srcdir)/.version:
-#	echo $(VERSION) > $@-t && mv $@-t $@
+#	echo '$(VERSION)' > $@-t
+#	mv $@-t $@
 # dist-hook:
-#	echo $(VERSION) > $(distdir)/.tarball-version
+#	echo '$(VERSION)' > $(distdir)/.tarball-version
 
 
 me=$0
 
+year=`expr "$scriptversion" : '\([^-]*\)'`
 version="git-version-gen $scriptversion
 
-Copyright 2011 Free Software Foundation, Inc.
+Copyright (C) ${year} Free Software Foundation, Inc.
-There is NO warranty.  You may redistribute this software
+License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
-under the terms of the GNU General Public License.
+This is free software: you are free to change and redistribute it.
-For more information about these matters, see the files named COPYING."
+There is NO WARRANTY, to the extent permitted by law."
 
 usage="\
 Usage: $me [OPTION]... \$srcdir/.tarball-version [TAG-NORMALIZATION-SED-SCRIPT]
@@ -85,8 +87,9 @@ Print a version string.
 
 Options:
 
-   --prefix           prefix of git tags (default 'v')
+   --prefix PREFIX    prefix of git tags (default 'v')
-   --fallback         fallback version to use if \"git --version\" fails
+   --fallback VERSION
+                      fallback version to use if \"git --version\" fails
 
    --help             display this help and exit
    --version          output version information and exit
@@ -100,8 +103,8 @@ while test $# -gt 0; do
   case $1 in
     --help) echo "$usage"; exit 0;;
     --version) echo "$version"; exit 0;;
-    --prefix) shift; prefix="$1";;
+    --prefix) shift; prefix=${1?};;
-    --fallback) shift; fallback="$1";;
+    --fallback) shift; fallback=${1?};;
     -*)
       echo "$0: Unknown option '$1'." >&2
       echo "$0: Try '--help' for more information." >&2
@@ -140,11 +143,9 @@ then
     v=`cat $tarball_version_file` || v=
     case $v in
         *$nl*) v= ;; # reject multi-line output
-        [0-9]*) ;;
-        *) v= ;;
     esac
     test "x$v" = x \
-        && echo "$0: WARNING: $tarball_version_file is missing or damaged" 1>&2
+        && echo "$0: WARNING: $tarball_version_file is damaged" 1>&2
 fi
 
 if test "x$v" != x
@@ -166,9 +167,10 @@ then
     # tag or the previous older version that did not?
     #   Newer: v6.10-77-g0f8faeb
     #   Older: v6.10-g0f8faeb
-    case $v in
+    vprefix=`expr "X$v" : 'X\(.*\)-g[^-]*$'` || vprefix=$v
-        *-*-*) : git describe is okay three part flavor ;;
+    case $vprefix in
-        *-*)
+        *-*) : git describe is probably okay three part flavor ;;
+        *)
             : git describe is older two part flavor
             # Recreate the number of commits and rewrite such that the
             # result is the same as if we were using the newer version
@@ -183,9 +185,9 @@ then
             ;;
     esac
 
-    # Change the first '-' to a '.', so version-comparing tools work properly.
+    # Change the penultimate "-" to ".", for version-comparing tools.
-    # Remove the "g" in git describe's output string, to save a byte.
+    # Remove the "g" to save a byte.
-    v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-/'`;
+    v=`echo "$v" | sed 's/-\([^-]*\)-g\([^-]*\)$/.\1-\2/'`;
     v_from_git=1
 elif test "x$fallback" = x || git --version >/dev/null 2>&1; then
     v=UNKNOWN
@@ -199,7 +201,7 @@ v=`echo "$v" |sed "s/^$prefix//"`
 # string we're using came from git.  I.e., skip the test if it's "UNKNOWN"
 # or if it came from .tarball-version.
 if test "x$v_from_git" != x; then
-  # Don't declare a version "dirty" merely because a time stamp has changed.
+  # Don't declare a version "dirty" merely because a timestamp has changed.
   git update-index --refresh > /dev/null 2>&1
 
   dirty=`exec 2>/dev/null;git diff-index --name-only HEAD` || dirty=
@@ -214,12 +216,12 @@ if test "x$v_from_git" != x; then
 fi
 
 # Omit the trailing newline, so that m4_esyscmd can use the result directly.
-echo "$v" | tr -d "$nl"
+printf %s "$v"
 
 # Local variables:
-# eval: (add-hook 'write-file-hooks 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-time-zone: "UTC"
+# time-stamp-time-zone: "UTC0"
 # time-stamp-end: "; # UTC"
 # End:

configure.ac

@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.69])
-AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_MACRO_DIRS([m4])
 AC_INIT([dhcpd-pools],
 	[m4_esyscmd([build-aux/git-version-gen .tarball-version])],
 	[kerolasa@iki.fi],[],

lib/.gitignore

@@ -150,6 +150,8 @@
 /stdio.h
 /stdio-impl.h
 /stdio.in.h
+/stdio-read.c
+/stdio-write.c
 /stdlib.h
 /stdlib.in.h
 /stpncpy.c

src/output.c

@@ -628,8 +628,8 @@ static void html_header(struct conf_t *state, FILE *restrict f)
 	fprintf(f, "<meta charset=\"utf-8\">\n");
 	fprintf(f, "<meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">\n");
 	fprintf(f, "<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n");
-	fprintf(f, "<link rel=\"stylesheet\" href=\"https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css\" type=\"text/css\">\n");
+	fprintf(f, "<link rel=\"stylesheet\" href=\"https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css\" type=\"text/css\">\n");
-	fprintf(f, "<link rel=\"stylesheet\" type=\"text/css\" href=\"https://cdn.datatables.net/1.10.20/css/jquery.dataTables.min.css\">\n");
+	fprintf(f, "<link rel=\"stylesheet\" type=\"text/css\" href=\"https://cdn.datatables.net/1.12.1/css/jquery.dataTables.min.css\">\n");
 	fprintf(f, "<style type=\"text/css\">\n");
 	fprintf(f, "table.dhcpd-pools th { text-transform: capitalize }\n");
 	fprintf(f, "</style>\n");

tests/expected/formats

@@ -23,8 +23,8 @@ All networks           100    43     43.000       0     43    43.000
 <meta charset="utf-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
-<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" type="text/css">
+<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" type="text/css">
-<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.20/css/jquery.dataTables.min.css">
+<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.12.1/css/jquery.dataTables.min.css">
 <style type="text/css">
 table.dhcpd-pools th { text-transform: capitalize }
 </style>