v0.5.4

Added

• Quic protocol can now be disabled using the --disable-quic flag
• Mycelium can now be started with a configuration file using --config-file.
  If no configuration file is supplied, Mycelium will look in a default location
  based on the OS. For more information see README
• Windows installer for Mycelium. The .msi file can be downloaded from the release
  assets.
• Added flag to specify how many update workers should be started, which governs
  the amount of parallelism used for processing updates.
• Send a seqno request if we receive an unfeasible update for a subnet with no
  routes, or if there is no selected route for the subnet.
• New public peers in US, India, and Singapore.

Changed

• Increased the starting metric of a peer from 50 to 1000.
• Reworked the internals of the routing table, which should reduce memory consumption.
  Additionally, it is now possible to apply updates in parallel
• Periodically reduce the allocated size of the seqno cache to avoid wasting some
  memory which is not currently used by the cache but still allocated.
• Demote seqno cache warnings about duplicate seqno requests go debug lvl, as it
  is valid to send duplicate requests if sufficient time passed.
• Skip route selection after an unfeasible update to a fallback route, as the (now
  unfeasible) route won't be selected anyway.
• No longer refresh route timer after an unfeasbile update. This allows routes
  which have become unfeasible to gracefully be removed from the routing table
  over time.
• Expired routes which aren't selected are now immediately removed from the routing
  table.
• Changed how updates are sent to be more performant.
• A triggered update is no longer sent just because a route sequence number got
  increased. We do still send the update to peer in the seqno request cache.
• Reduced log level when a route changes next-hop to debug from info.

Fixed

• When running mycelium with a command, a keyfile was loaded (or created, if not
  yet present). This was not necessary in that context.
• Limit the amount of time allowed for inbound quic connections to be set up, and
  process multiple of them in parallel. This fixes a DOS vector against the quic
  listener.
• We now update the source table even if we don't send an update because we are
  sure the receiver won't select us as a next-hop anyway.