Introduce archive_read_disk_set_name_filter_callback and archive_read_disk_set_time_f...

Introduce archive_read_disk_set_name_filter_callback and archive_read_disk_set_time_filter_callback.
That is used for directory traversals to improve performance.
A name filter callback set by archive_read_disk_set_name_filter_callback will be called just after
the file is selected as next an entry; only pathname is set in the archive_entry object.
A time filter callback set by archive_read_disk_set_time_filter_callback will be called just after
the meta data such as mtime or ctime is set in the archive_entry object.
In the time filter callback, you can use archive_read_disk_can_descend and archive_read_disk_descend.

SVN-Revision: 4049