Traditional httpd

/etc/apache2/
Virtual hosts are defined in sites-available/ and symlinked to sites-enabled. Manage them through the a2ensite/a2dissite helpers.

Debian config hierarchy:

/etc/apache2/
|-- apache2.conf
|	`--  ports.conf
|-- mods-enabled
|	|-- *.load
|	`-- *.conf
|-- conf-enabled
|	`-- *.conf
`-- sites-enabled
	`-- *.conf