autoBlock, enhance ban list and such

https://github.com/SpudGunMan/meshing-around/issues/252

# Enable or disable automatic banning of nodes
autoBanEnabled = False

config.template

@@ -481,3 +481,9 @@ DEBUGpacket = False
 # metaPacket detailed logging, the filter negates the port ID
 debugMetadata = False
 metadataFilter = TELEMETRY_APP,POSITION_APP
+# Enable or disable automatic banning of nodes
+autoBanEnabled = False
+# Number of offenses before auto-ban
+autoBanThreshold = 5
+# Timeframe for offenses (in seconds)
+autoBanTimeframe = 3600