libpcap: Update to 1.10.6
Changes: https://raw.githubusercontent.com/the-tcpdump-group/libpcap/89e982c37c36ad0bf9f10b7ded421cb42422effa/CHANGES
Reviewed by: bms, emaste
Obtained from: https://www.tcpdump.org/release/libpcap-1.10.6.tar.gz
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D55545
Differential Revision: https://reviews.freebsd.org/D55858