Autostart pure-ftpd by running its Perl configuration file at the command line

I have manually built the pure-ftpd on my Raspberry Pi and it runs perfectly fine when I invoke /etc/pure-config.pl /etc/pure-ftpd.conf from the command line. I'd like to run that simple command /etc/pure-config.pl /etc/pure-ftpd.conf in init.d like as if I'm running them at the command line. The official or the custom init.d startup scripts are no good for me because they try to run pure-ftpd directly i.e. without the /etc/pure-ftpd.conf file. I need to run it with the /etc/pure-ftpd.conf How to do it? Thanks.