the redhat apache.conf contains lots of stuff for modules that is not installed
by default, which makes it hard to maintain. I think using the apache mechanism
of including all files in a directory for config-files into the main http.conf
would be a good idea. For example a /etc/httpd/conf.d directory could be ceated
and /etc/httpd/conf/httpd.conf could include 'Include /etc/httpd/conf.d'. Then
for example the php package could contain all all its configuration stuff (that
normally goes into the main httpd.conf in for example /etc/httpd/conf.d/php.conf

This would follow a classical redhat pattern used in many places, for example
/etc/profile.d and /etc/logrotate.d