,
Include file as if it were part of the configuration file. If file is a relative file name, it will be looked in the include directory (see below).
This directive is allowed both at topmost level and in any subsections of the configuration file.
Set the include directory, i.e. the directory where
pound looks for relative file names that appear in other
configuration directives: Include, BasicAuth,
ErrorFile (or Err400 through Err503), as well as
in the argument to -file option in service matching directives
(see -file).
The default value is the system configuration directory as set at
compile time (you can check its value in the output of pound
-V). This initial value can be changed in the command line using the
-W include-dir=dir command line option or reset to the
current working directory using the -W no-include-dir option
(see Usage).