Additions

• wire/ipsec: add basic IPsec parsing/emitting (#821).
• phy: add support for TUNSETIFF on MIPS, PPC and SPARC (#839).
• socket/tcp: accept FIN on zero window (#845).
• wire/ipv6: add is_unique_local() to IPv6 addresses (#862).
• wire/ipv6: add is_global_unicast() to IPv6 addresses (#864).
• iface/neigh: add fill_with_expiration (#871).

Fixes

• icmpv6: truncate packet to MTU (#807, #808).
• wire/rpl: DAO-ACK DODAG ID was wrongly read (#824).
• socket/tcp: don't panic when calling listen again on the same local endpoint (#841).
• wire/dhcpv4: don't panic when parsing addresses with incorrect amount of bytes (#843).
• iface/ndisc: prevent ndisc when the medium is IP (#865).
• wire/ieee802154: better parsing of security fields. Correctly parse frame type (3 bits instead of 2 bits) (#868).
• wire/ieee802154: better handle address fields for new frame version (#870).
• iface/tcp: don't send TCP RST with unspecified addresses ().

Changes

• iface: rewrite IpPacket such that IPv6 packets can contain owned extension headers (#802).
• iface: remove generic T: [u8] in functions. This reduced the server example by 10KB (#810).
• SocketSet: add comment about using static lifetime for SocketSets with owned storage (#813).
• phy/RawSocket: open raw socket with O_NONBLOCK (#817).
• tests/rstest: use rstest for fixture based testing (#823).
• docs/readme: update readme about IEEE802.15.4 and 6LoWPAN (#826).
• wire/ipv6-hbh: IPv6 HBH has owned options instead of references (#827).
• wire/sixlowpan: 6LoWPAN is split into multiple modules (#828).