Clicking the Syndication Feed Icon on a community or collection results in a 404 Whitelabel Error Page

[MW3000]

Describe the bug Clicking the Syndication Feed Icon on a community or collection in 7.4 results in a 404 Whitelabel Error Page. Not sure if a wrong link is displayed or if the link is correct but no feed is served by the backend.

To Reproduce Steps to reproduce the behavior:

1. Navigate to any community or collection, e.g. on the DSpace 7 Demo Site: https://demo7.dspace.org/collections/add23764-0671-4b11-8463-d8c60bf4c744
2. Click the feed icon
3. You will see a 404 Whitelabel Error Page

Expected behavior I expect a valid feed that includes the publications of this community or collection

[tdonohue]

I've verified this locally & on demo7.dspace.org. It appears, to me, that the link is incorrectly generated in the UI.

The UI is creating feed links that look like this:

${dspace.server.url}/opensearch/search/search?(params)

That throws a 404.

Instead, the correct link is this:

${dspace.server.url}/opensearch/search?(params)

I'm not sure where the extra /search is coming from yet. I'll pull this over to our board though and flag as high priority & needing a volunteer.

[nwoodward]

Looking at the history of the RSS component, the opensearch link was hard-coded until this commit that brought in the websvc.opensearch.svccontext parameter from dspace.cfg in the REST API – https://github.com/DSpace/dspace-angular/commit/be8a8f5f6bf9359eecc8034b22c522fe9ac1389f. But the changes to the formulateRoute method don't accord with the default value of svccontext. I'll create a small PR.