Log Message:
(math/mpfr) Adding official patch mpfr-4.1.1 to 4.1.1p

openscad-2021.01nb13 failed with math/mpfr-4.1.1
  \ 
http://www.ki.nu/pkgsrc/reports/current/NetBSD-9.0/20221123.2254/openscad-2021.01nb13/build.log

For this problem and as well as
  https://github.com/CGAL/cgal/issues/7064

patch is supplied at
  https://www.mpfr.org/mpfr-4.1.1/patch01
and patches are one of the pieces: for file to file from above.
See also:
  http://mail-index.netbsd.org/pkgsrc-users/2022/11/26/msg036540.html

 openscad has PKGREVISION++ because of icu update almost at the same time,
and not packaged since then, so no PKGREVISION++ is necessary, (OK ?)