[users@httpd] Apache HTTP Server - 2.4.15-mod_prefork module

[Velmurugan Dhakshnamoorthy]

Dear,
Any help how do I explicitly  install and enable mod_prefork module for
Apache 2.4.15 proxy.
When I installed Apache proxy,  chose mod_modules to all,  but prefork is
not installed,  cannot see it in modules folder.

Please help.

Regards,
Vel