Error: md2man routine not found

[puterboy]

When I run ./configure, I get the following error:

Configure found the following issues:

- You need python3 and either the cmarkgfm OR commonmark python3 lib in order
  to build manpages based on the git source (manpages are included in the
  official release tar files).

even though I have python3 and commonmark installed (similarly if I install cmarkgrfm).
It seems though that the problem is that the rsync source directory is missing the exectuable md2man that is called as follows in configure.ac:

md2man_out=`"$srcdir/md2man" --test "$srcdir/rsync-ssl.1.md" 2>&1

To get config to work I needed to add --disable-md2man to the command line.
Perhaps that should be changed in the config code...