/usr/share/man/man3/pcap_datalink_val_to_description.3pcap.gz is in libpcap0.8-dev 1.6.2-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/pcap_datalink_val_to_name.3pcap.gz
/usr/share/man/man3/pcap_datalink_val_to_name.3pcap.gz