Version 2.2.0

• Added support for reassembly of multipart CLNP and COTP packets. This brings
  the ability to decode ADS-C v2 messages which are too large to fit in a single
  CLNP / COTP packet, even if fragmented in the X.25 layer.
• Added proper formatting of Route Clearance CPDLC message elements.
• Removed the obsolete 8-channel limit. The maximum number of VDL2 channels that
  can be decoded simultaneously is now limited only by the hardware (thx
  @rpatel3001).
• Station ID (specified with --station-id option) is now appended to the StatsD
  namespace if StatsD metric collection is enabled. For example, if the station
  ID is set to KLAX, the new namespace would be "dumpvdl2.KLAX" instead of just
  "dumpvdl2". This allows simultaneous monitoring of several dumpvdl2 instances
  separately in Grafana (thx @cdschuett).
• Fixed a crash which occurred when the ground station list file could not be
  opened.