ange-ftp-parse-list-func-alist is a variable defined in `ange-ftp.el'.
Its value is

((bs2000 . ange-ftp-parse-bs2000-listing) (cms . ange-ftp-parse-cms-listing) (mts . ange-ftp-parse-mts-listing) (vms . ange-ftp-parse-vms-listing))

Alist saying how to parse directory listings for certain OS types.
Association list of (TYPE . FUNC) pairs. The FUNC is a routine which
can parse the output from a DIR listing for a host of type TYPE.