You may not set a parameter that didn't exist in the original configuration file. See newval below to do this. Otherwise, it returns 1. Adds a new value to the configuration file. Returns undef if the file can not be opened.
Sections Returns an array containing section names in the configuration file.
Groups Returns an array containing the names of available groups. This is useful for building up lists. Each element of the array is a section name. Also see BUGS below. RewriteConfig Same as WriteConfig, but specifies that the original configuration file should be rewritten.