maint: propagate gnulib changes

bootstrap

diff --git a/bootstrap b/bootstrap
index 6542faa..3dac644 100755
--- a/bootstrap
+++ b/bootstrap
@@ -3,7 +3,7 @@
 
 scriptversion=2025-06-10.02; # UTC
 
-# Copyright (C) 2003-2025 Free Software Foundation, Inc.
+# Copyright (C) 2003-2026 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

bootstrap-funclib.sh

diff --git a/bootstrap-funclib.sh b/bootstrap-funclib.sh
index 3bedf36..8a0116a 100644
--- a/bootstrap-funclib.sh
+++ b/bootstrap-funclib.sh
@@ -1,6 +1,6 @@
 # A library of shell functions for autopull.sh, autogen.sh, and bootstrap.
 
-scriptlibversion=2025-06-10.02; # UTC
+scriptlibversion=2025-12-04.19; # UTC
 
 # Copyright (C) 2003-2026 Free Software Foundation, Inc.
 #
@@ -35,7 +35,7 @@
 # Honor $PERL, but work even if there is none.
 PERL="${PERL-perl}"
 
-default_gnulib_url=https://git.savannah.gnu.org/git/gnulib.git
+default_gnulib_url=https://https.git.savannah.gnu.org/git/gnulib.git
 
 # Copyright year, for the --version output.
 copyright_year=`echo "$scriptlibversion" | sed -e 's/[^0-9].*//'`
@@ -824,7 +824,8 @@
     elif check_exists git-merge-changelog; then
       echo "$0: initializing git-merge-changelog driver"
       git config merge.merge-changelog.name 'GNU-style ChangeLog merge driver'
-      git config merge.merge-changelog.driver 'git-merge-changelog %O %A %B'
+      git config merge.merge-changelog.driver \
+          'git-merge-changelog %O %A %B "%Y"'
     else
       echo "$0: consider installing git-merge-changelog from gnulib"
     fi