Authentication and Authorization – Apache HTTP Server Version 2.4 https://httpd.apache.org/docs/2.4/howto/auth.html
mod_auth_basic – Apache HTTP Server Version 2.4 https://httpd.apache.org/docs/2.4/mod/mod_auth_basic.html#authbasicprovider
htdbm – Manipulate DBM password databases – Apache HTTP Server Version 2.4 https://httpd.apache.org/docs/2.4/programs/htdbm.html