Ticket #476 - 389 ds do not start on F18 due to missing modules
    
    Bug description: Since apache 2.4, some module are no longer
    loaded by default.
    
    Fix description: As suggeted by the bug reporter, this patch
    adds httpd-2.4.conf.in to the source tree which loads missing
    modules:
        mpm_worker_module, access_compat_module, authn_core_module
        authz_core_module, authz_user_module, unixd_module
    
    https://fedorahosted.org/389/ticket/476
    
    Reviewed by Rich (Thank you!!)