- update to 4.4:
* Add RFC8335 extended echo types to `ICMP` and `ICMPv6`
* Handle loops in DNS name decompression
* Fix Windows' `interface` macro colliding with uses of that identifier in the code
* Sending IPv6 packets to a link-scope destination address now uses the right interface index
* Fix incorrect endian being used for ICMP's `gateway` and `address_mask`
* Socket in `PacketSender::open_l3_socket` is now closed if `setsockopt` fails
* Fix various incorrect doxygen documentation comments.
* Fix infinite loop when querying the routing table in \*BSD
* Assign a PDUType to `Dot11ControlTA`
* Don't consider IPv6 ESP header a normal extension header
* Don't include non-existing headers when installed without libpcap
* Add `IPv6Address::is_local_unicast`
* Fix memory leak in `PacketWriter`
* Fix memory leaks in `OfflinePacketFilter`
* Fix detection of new TCP stream
* Introduce `TCP::has_flags`
* Fix padding calculations in RadioTapWriter