featureNS is a misleading name

[bartvde]

featureNS is used, but the expected value is the featurePrefix

i.e. normally I would configure:

    layers.drawnItems = L.wfst(null,{
        // Required
        url : '/geoserver/opengeo/wfs',
        featureNS : 'http://opengeo.org',
        featureType : 'countries',
        primaryKeyField: 'id'
    }).addTo(map);

but this is what works (featurePrefix instead of featureNS):

    layers.drawnItems = L.wfst(null,{
        // Required
        url : '/geoserver/opengeo/wfs',
        featureNS : 'opengeo',
        featureType : 'countries',
        primaryKeyField: 'id'
    }).addTo(map);