From upstreams changelog:
 This rather large snapshot touches quite a few sensitive areas, so I'm
  releasing it now rather than later to receive feedback on any possible issues.
  It also contains fixes, so everybody should upgrade.

  * man: fix psk mention in wg-quick man page
  * man: update wg-quick(8) to show Debian resolvconf braindamage

  Documentation cleanups.

  * wg-quick: use src routing for default routes in v6

  ip-rule(8) doesn't do the right thing with source addresses, unless we
  explicitly set it inside the route. This fixes wg-quick on IPv6 systems.

  * curve25519: actually, do some things on heap sometimes
  * curve25519: align the basepoint to 32 bytes
  * curve25519: add NEON versions for ARM
  * data: enable BH during parallel crypto on ARM/NEON
  * chacha20poly1305: move constants to rodata
  * chacha20poly1305: add NEON versions for ARM and ARM64

  We now have faster primitives on ARM and ARM64 processors, which should
  improve performance.

  * handshake: process in parallel

  Handshakes are now processed in parallel using all cores, which should improve
  throughput during a storm.

  * noise: no need to store ephemeral public key
  * noise: precompute static-static ECDH operation

  We can precompute the ECDH(s, s) calculation, which improves handshake
  initiation message performance by double.

  * style: spaces after for loops
  * peer: use iterator macro instead of callback

  The most unreadable C ever produced. It might be wise to find a sexier-looking
  alternative at some point.

  * compat: remove warning for < 4.1
  * compat: ship padata if kernel doesn't have it

  The usual array of annoying compat things.

  * rust test: convert screech test to snow
  * rust test: add icmp ping

  We now use Jake's snow library for Noise in the test, which we've expanded to
  complete a ping.

  * config: do not error out when getting if no peers
  * tools: allow creating device with no peers

  Fixing some small things in the tool/config interaction.

  * device: keep going when share_check fails
  * routingtable: remove unnecessary check in node_placement()
  * config: it's faster to memcpy than strncpy
  * timers: fix typo in comment

  Nits.

  * debug: print interface name in dmesg

  For those who compile with `make debug`, you'll be happy to see a bit better
  information in dmesg.

  * timers: rework handshake reply control flow
  * timers: the completion of a handshake also is on key confirmation
  * timers: reset retry-attempt counter when not retrying

  Tightening up our timer implementation, which is quite important.

Signed-off-by: Dan Luedtke <mail@danrl.com>