ctdl.dat - discardable data (such as config.cit keywords)

long	version
long	discardable entries

(repeat)
long	offset of entries
(repeat)

each entry:

	long	number of subentries
	
	(repeat)
	int	subentry type
	long	subentry length
	....	subentry data
	(repeat)
	

subentry types:
	DD_STRING (0): string table

	string<nul>string<nul>...

	load data into *data, build array of offsets in *aux

	DD_RAWDATA (1): Raw data

	load data into *data

	DD_STRCMP (2): Compressed string table

	load data into *data, decompress, build array of offsets in *aux
