Update to MapServer 8.0 syntax and add OGC Features API

[geographika]

• Remove keywords that have been deprecated and then removed in v8 of MapServer
• Add layer and web metadata to enable OGC Features API
• Adds FID columns to all datasets (which is why the DBF files have been modified).

[geographika]

Note - this should be merged when the MapServer 8.0 release comes out, or the demo will no longer work.

Update - it appears the demo site is already using a newer version of MapServer as the following URL is returning an error:

https://demo.mapserver.org/cgi-bin/mapserv?map=%2Fmapserver%2Fapps%2Fitasca_legend%2Fmap%2Fitasca1.map&layers=all&zoomsize=2&zoomdir=1&map_size=600+400

[geographika]

Note to work correctly in MapServer 8 the TEMPLATE parameter needs to be modifiable from a URL.
See MapServer/MapServer#6469 (comment)

We'll likely need to expand run-time substitution a little - web->template would be one, layer->mask is another (there was a user request for that one). I was planning on adding those as a commit to this pull request.

[sdlime]

Note to work correctly in MapServer 8 the TEMPLATE parameter needs to be modifiable from a URL. See MapServer/MapServer#6469 (comment)

We'll likely need to expand run-time substitution a little - web->template would be one, layer->mask is another (there was a user request for that one). I was planning on adding those as a commit to this pull request.

I did add layer->mask ahead of 8.0, just missed web->template. Have you run into any others? The demo is pretty old-school and should be a good test.

[geographika]

@sdlime - not so far, but I was unable to test much apart from manually updating the TEMPLATE parameter in the Mapfile. I'll hopefully be able to test further on a new OSGeoLive beta, and maybe add a link to the OGC Features.