Fix requirement of lat/lon for virtual stations (#721)

Author: richfab

gbfs.md

@@ -804,7 +804,7 @@ Field Name | REQUIRED | Type | Defines
 `stations[].post_code` | OPTIONAL | String | Postal code where station is located.
 `stations[].station_opening_hours` <br/>*(added in v3.0)* | OPTIONAL | String | Hours of operation for the station in [OSM opening_hours](https://wiki.openstreetmap.org/wiki/Key:opening_hours) format. If `station_opening_hours` is defined it overrides any `opening_hours` defined in `system_information.json` for the station for which it is defined.
 `stations[].rental_methods` | OPTIONAL | Array&lt;String&gt; | Payment methods accepted at this station. <br /> Current valid values are:<br /> <ul><li>`key` (operator issued vehicle key / fob / card)</li><li>`creditcard`</li><li>`paypass`</li><li>`applepay`</li><li>`androidpay`</li><li>`transitcard`</li><li>`accountnumber`</li><li>`phone`</li></ul>
-`stations[].is_virtual_station` <br/>*(added in v2.1)* | OPTIONAL | Boolean | Is this station a location with or without smart dock technology? <br /><br /> `true` - The station is a location without smart docking infrastructure.  the station may be defined by a point (lat/lon) and/or `station_area` (below). <br /><br /> `false` - The station consists of smart docking infrastructure (docks). <br /><br /> This field SHOULD be published by mobility systems that have station locations without standard, internet connected physical docking infrastructure. These may be racks or geofenced areas designated for rental and/or return of vehicles. Locations that fit within this description SHOULD have the `is_virtual_station` boolean set to `true`.
+`stations[].is_virtual_station` <br/>*(added in v2.1)* | OPTIONAL | Boolean | Is this station a location with or without smart dock technology? <br /><br /> `true` - The station is a location without smart docking infrastructure.<br /><br /> `false` - The station consists of smart docking infrastructure (docks). <br /><br /> This field SHOULD be published by mobility systems that have station locations without standard, internet connected physical docking infrastructure. These may be racks or geofenced areas designated for rental and/or return of vehicles. Locations that fit within this description SHOULD have the `is_virtual_station` boolean set to `true`.
 `stations[].station_area` <br/>*(added in v2.1)* | OPTIONAL | GeoJSON MultiPolygon | A GeoJSON MultiPolygon that describes the area of a virtual station. If `station_area` is supplied, then the record describes a virtual station. <br /><br /> If lat/lon and `station_area` are both defined, the lat/lon is the significant coordinate of the station (for example, parking facility or valet drop-off and pick up point). The `station_area` takes precedence over any `ride_start_allowed` and `ride_end_allowed` rules in overlapping `geofencing_zones`.
 `stations[].parking_type` <br/>*(added in v2.3)* | OPTIONAL | Enum | Type of parking station.<br /><br />Current valid values are:<ul><li>`parking_lot` _(Off-street parking lot)_</li><li>`street_parking` _(Curbside parking)_</li><li>`underground_parking` _(Parking that is below street level, station may be non-communicating)_</li><li>`sidewalk_parking` _(Park vehicle on sidewalk, out of the pedestrian right of way)_</li><li>`other`</li></ul>
 `stations[].parking_hoop`<br/>*(added in v2.3)* | OPTIONAL | Boolean | Are parking hoops present at this station?<br /><br />`true` - Parking hoops are present at this station.<br />`false` - Parking hoops are not present at this station.<br /><br />Parking hoops are lockable devices that are used to secure a parking space to prevent parking of unauthorized vehicles.