* tools/gpgtar.h (struct tarinfo_s): New.
* tools/gpgtar.c (cmd, skip_crypto, files_from, null_names): Move
global vars more to the top.
(set_cmd): Rename 'cmd' to 'c'.
* tools/gpgtar-list.c (parse_header): Add arg 'info' and improve error
messages.
(read_header): Add arg 'info' and update counter.
(skip_data): Ditto.
(gpgtar_list): Pass info object to read functions.
(gpgtar_read_header): Add arg 'info'.
* tools/gpgtar-extract.c (gpgtar_extract): add arg 'info' and pass on.
(extract_regular): Add arg 'info' and update counter.