[GRASS-git] [OSGeo/grass] 31bd07: configure: update to autoconf 2.71 (#2281)

[Nicklas Larsson]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: 31bd07a3e52ba0c59cee389d0da3f1ae1b8f3e7a
      https://github.com/OSGeo/grass/commit/31bd07a3e52ba0c59cee389d0da3f1ae1b8f3e7a
  Author: Nicklas Larsson <n_larsson at yahoo.com>
  Date:   2023-12-22 (Fri, 22 Dec 2023)

  Changed paths:
    M aclocal.m4
    M configure
    M configure.ac
    M doc/development/submitting/general.md
    M imagery/i.cluster/global.h
    M include/grass/config.h.in

  Log Message:
  -----------
  configure: update to autoconf 2.71 (#2281)