Man pages matching name digest_file_auth in section 8:

digest_file_auth.8.en	debian 10 / squid
digest_file_auth.8.en	debian 11 / squid
digest_file_auth.8.en	debian 11 / squid-openssl
digest_file_auth.8.en	debian 12 / squid
digest_file_auth.8.en	debian 12 / squid-openssl