magical config file parser

 Config::Auto allows developers to parse config files without
 needing to specify the format of the file (though they can do it).
 .
 It even looks for the config file in standard places (working dir,
 home dir, /etc) and tries some common config file names if the path
 isn't specified in the call.
 .
 It then determines the format of the config file, parses it and then
 returns a data structure containing the configuration data. The format
 of this structure depends on the format of the file.
 .
 At the moment, libconfig-auto-perl knows about colon, space and equals
 separated, XML, Perl, Windows INI, BIND9 and irssi style config files,
 though files in BIND9 or irssi format cannot be parsed.