Link in SLD doc returns an exception

[brentfraser]

On the SLD page under Server Side Support, it says "Test the remote SLD request" with a link to 

https://demo.mapserver.org/cgi-bin/wms?SERVICE=wms&VERSION=1.1.1&REQUEST=GetMap&LAYERS=country_bounds&FORMAT=png&WIDTH=400&HEIGHT=300&SRS=EPSG:4326&STYLES=&BBOX=-180.0,-90.0,180.0,90.0&TRANSPARENT=TRUE&SLD=https://demo.mapserver.org/ogc-demos/map/sld/sld_line_simple.xml

The link looks good but it returns a 404 status, likely due to a missing sld_line_simple.xml file.

[geographika]

For info this is still the case, with the following exception returned:

<?xml version='1.0' encoding="UTF-8" standalone="no" ?>
<!DOCTYPE ServiceExceptionReport SYSTEM "http://schemas.opengis.net/wms/1.1.1/exception_1_1_1.dtd">
<ServiceExceptionReport version="1.1.1">
<ServiceException>
msSLDApplySLDURL: WMS server error. Could not open SLD https://demo.mapserver.org/ogc-demos/map/sld/sld_line_simple.xml and save it in a temporary file. Please make sure that the sld url is valid and that the temporary path is set. The temporary path can be defined for example by setting TEMPPATH in the map file. Please check the MapServer documentation on temporary path settings.
msHTTPExecuteRequests(): HTTP request error. HTTP GET request failed with status 404 () for https://demo.mapserver.org/ogc-demos/map/sld/sld_line_simple.xml
</ServiceException>
</ServiceExceptionReport>