Added fix for an unknown packet type

If we get a packet that doesn't have a message in it, nor an ack,
we don't know what to do with it, so log it and then stop processing it.

ChangeLog

@@ -4,6 +4,7 @@ CHANGES
 v1.1.0
 ------
 
+* Added fix for an unknown packet type
 * Ensure fortune is installed
 * Updated docker-compose
 * Added Changelog
@@ -11,6 +12,7 @@ v1.1.0
 * Updated the aprsd-slack-plugin required version
 * Updated README.rst
 * Fixed send-message with email command and others
+* Update .gitignore
 * Big patch
 * Major refactor
 * Updated the Dockerfile to use alpine

aprsd/main.py

@@ -192,6 +192,10 @@ def process_packet(packet):
                 )
                 messaging.ack_dict.update({int(ack_num): 1})
                 return
+            else:
+                LOG.info("Don't know what to do with this message.  Ignoring")
+                messaging.log_packet(packet)
+                return
 
         msg_number = packet.get("msgNo", None)
         if msg_number: