archive_read_support_format_empty(3) on FreeBSD
The text 9e0646497aad, as FreeBSD 12.1-RELEASE, FreeBSD 12.0-RELEASE, FreeBSD 11.3-RELEASE, FreeBSD 11.2-RELEASE, FreeBSD 11.1-RELEASE, FreeBSD 10.4-RELEASE shipped it.
functions for reading streaming archives