docs: add documentation to gluon-config-mode-geo-location-osm package

docs/dev/web/config-mode.rst

@@ -20,7 +20,7 @@ gluon-config-mode-hostname
 gluon-config-mode-geo-location
     Enables the user to set the geographical location of the node.
 
-gluon-config-mode-geo-location-osm
+:doc:`../../package/gluon-config-mode-geo-location-osm`
     Lets the user click on a map to select the geographical location through a OSM map
 
 gluon-config-mode-contact-info

docs/index.rst

@@ -64,6 +64,7 @@ Several Freifunk communities in Germany use Gluon as the foundation of their Fre
 
   package/gluon-client-bridge
   package/gluon-config-mode-domain-select
+  package/gluon-config-mode-geo-location-osm
   package/gluon-ebtables-filter-multicast
   package/gluon-ebtables-filter-ra-dhcp
   package/gluon-ebtables-limit-arp

docs/package/gluon-config-mode-geo-location-osm.rst

+.. _package-gluon-config-mode-geo-location-osm:
+
+gluon-config-mode-geo-location-osm
+==================================
+
+When package *gluon-config-mode-geo-location-osm* is enabled, the configuration wizard will
+try to load an OSM-based map to allow the user to specify the node location.
+Loading the map requires a working internet connection, for example via WLAN
+(while connected to the Gluon node via Ethernet).
+
+.. image:: gluon-config-mode-geo-location-osm.png