rfe: include ioncube loaders

Maybe add a --with-ioncube or just make the default config include ioncube loaders.

This worked on a debian 9 system with php5.6 - 7.3, I haven't tested debian 10 nor 7.4, but I suspect it will still work:

cd /root
wget https://downloads.ioncube.com/loader_downloads/ioncube_loaders_lin_x86-64.tar.gz
tar xzvf ioncube_loaders_lin_x86-64.tar.gz
cd ioncube/

for ver in `cd /etc/php; ls -1d ?.?`
do
  if [ -f ioncube_loader_lin_${ver}.so ]
  then
    lib=`php${ver} -i | grep ^extension_dir | sed 's/^.*=> *//g'`
    if [ -d ${lib} ]
    then
      cp ioncube_loader_lin_${ver}.so ${lib}
      for f in /etc/php/${ver}/*/php.ini
      do
        sed -i '/^zend_extension/d' ${f}
        sed -i "1i zend_extension=${lib}/ioncube_loader_lin_${ver}.so" ${f}
      done
    fi
    service php${ver}-fpm restart
  fi
done