Change get feature request for forest limits

[kalbermattenm]

there are rare cases, where a parcel is entirely between a forest limit and a forest without touching either of them. Nevertheles we must detect the parcel as subject to the restriction. But the forest limit is only a polyline. - So a general buffer won't do, we need a directed line and single-side buffer.

[kalbermattenm]

Moreover, it is really weird because we do a WFS and then a get feature request...