bug#65674: Build failure with <openssl-3

[Sam James]

Hello,

Forwarding a downstream report at https://bugs.gentoo.org/913368
of coreutils-9.4 failing to build with openssl-1.1.x:
"""
x86_64-pc-linux-gnu-gcc  -I. -I./lib  -DHASH_ALGO_BLAKE2=1 -DHAVE_CONFIG_H 
-Ilib -I./lib -Isrc -I./src    -O2 -march=x86-64 -pipe -pipe 
-frecord-gcc-switches -fno-diagnostics-color -fmessage-length=0 -c -o 
src/b2sum-digest.o `test -f 'src/digest.c' || echo './'`src/digest.c
In file included from src/digest.c:41:
./lib/md5.h:36:12: fatal error: openssl/configuration.h: No such file or 
directory
   36 | #  include <openssl/configuration.h>
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
"""

This appears to have been introduced with gnulib commit
a436f5f498d7e747864d40d4450fa8330dd44d12.

configuration.h is only available with >=openssl-3.

thanks,
sam