Comments begin with the # sign, continues as far as the end of line; everything that comes after the value field is also ignored.

Blanks are spaces and tabs and they are ignored; nevertheless, for example blank still cannot appear in the middle of a variable name, as described in section variable, node and alias names.

Include directive has form:

!include <path/file>

Include must always be placed on a separate line. path should be a relative path to another (so-called nested) configuration file, which will be processed at this point before continuing processing of the original file.