Apache Reference: http_core, ServerRoot
Server Root Directory
Syntax: ServerRoot A
Example: ServerRoot /sw/pkg/apache
Since: Apache 1.0
This directive sets the root directory in which the server
resides. Typically, it contains the subdirectories conf/ and
logs/. Relative paths for other configuration files are taken
as relative to this directory. This directive can be also overridden from
the command line via the -d option.