What is the reason of using apache2.conf instead of httpd.conf?

[Lengyel Róbert <len@jaguar.unideb.hu>]

Hi Everyone!

I don't know why was it necessary to change the configuration
file from httpd.conf to apache2.conf in the apache2 debian package.

It annoys me very much. I wonder if there is a reason behind this. 
Does anyone know it?

Thanks. 

Regards,

Robert