WMS request with MIME type text/html fails if template is invalid

[assefa]

Here is the current situation:

 When using the text/html mime type, mapserver will use the template file set 
on
the layer and returns text/html as content type and also the template content
replaced with appropriate value.  It works fine when the template is set to an
existing file.

 The problem occurs when there the template value points to a non existing 
value.

 To correct this here are the changed done :

  the text/html is not advertized by default and will only be advertized if
  the user has defined "WMS_FEATURE_INFO_MIME_TYPE"  "text/html"


 Jeff can you do an update on this in wms-howto :

 Section wms_feature_info_mime_type:

 - used to specify additional MIME type that can be used when responding
    to the GetFeature request. 
    For example if you want to use the layer's HTML template as a base for it's
response, you need to add "WMS_FEATURE_INFO_MIME_TYPE"  "text/html". Setting
this will have the effect of adertizing text/html as one of the MIME types
supported for a GetFeature request. Ypu also need make sure that the layer
points to a valid html template.  The client can then call the server with
INFO_FORMAT=text/html.


 - if not specified, Mapserver by default has text/plain and GML implemented

  Note that the "none" thing used is no more valid and should be removed.

[assefa]

Reassign to Jeff for doc update.

[jmckenna@…]

wms-server doc updated for feature_info_mime_type changes.