[Slackbuilds-users] Libraries/miniupnpc (2.2.3) uses PYTHON3=yes by default

[Slackbuilds]

The buildscript has

# For python 3.x support.
if [ "${PYTHON3:-yes}" == "yes" ]; then
  CFLAGS="$SLKCFLAGS" \
  python3 setup.py build
  python3 setup.py install --root=$PKG
fi

while the README stats

Note: To install python 3 bindings set PYTHON3=yes.
  # PYTHON3=yes ./miniupnpc.SlackBuild

Somewhere we need a PYTHON3=no, depending on intent.

CC: the listed maintainer.

-Ed