It also cannot start with spaces or tabs since those are considered part of the whitespace after the colon. It is important to keep in mind that any trailing spaces or tabs will be included. The effect on the value is that a space is added where the line split occurs. If an attribute is specified more than once in the file, only the last one will be used. If the given file name is not fully qualified, it is taken relative to the directory in which the current configuration file is found.
Variable expansion is permitted in the file name.
Multiple include statements, and nested includes are also permitted.