geoclue/beacondb.conf: contribute data back

etc/geoclue/conf.d/beacondb.conf

@@ -1,7 +1,10 @@
-# Attempt to use beacondb.net with geoclue. However as I use Sway and I
+# https://beacondb.net & https://beacondb.net/map
-# don't use .desktop files, nothing has permission to access geoclue and I
-# have thus disabled it, but maybe on Plasma, family PC, or just in case this
-# should be noted.
 [wifi]
 enable=true
 url=https://beacondb.net/v1/geolocate
+# Contributing back
+submit-data=true
+submission-url=https://beacondb.net/v2/geosubmit
+# I doubt this is used, but explicitly set just in case of it suddenly
+# becoming $(whoami)
+submission-nick=geoclue