+22Dec21=======================================================================
+1. Add the possibility to do "sender verify" that spots (and later on, other
+ things like announce etc) are coming from spotters that exist on the node
+ that the PC11/61 says it does. At the moment, this is advisory as many
+ users seem to be on web clusters and many of them do not send PC61 and also
+ don't update the node's routing tables that normal node usage would do.
+2. Prioritise PC61 spots over PC11 spots wherever possible. Also promote PC11
+ spots to PC61 where the spotter's IP is known.
+3. Add a shell script "perlbrew-dxspider" that can be used for starting the
+ node when using perlbrew (i.e. more modern perls) on older distros such
+ as Centos 7/8.
+4. Allow to "dx by <spotter> ip <ip address> <qrg> <spot call> <comment>.
+ This is added as a convenience measure for webcluster authors while waiting
+ for the internal websocket interface (or because they cannot use that).
+ This can only be used by suitably privileged users.
+ This likely to be a temporary measure and will be immediately withdrawn if
+ there is any sign of abuse.