SItemap plugin: proper fix for HIPPLUG-858: XML-feed created by sitemap.xml plugin isn't marked as XML

– Worked around on HIPPLUG-858, waiting for HSTTWO-3012 to fix this one –

– Original Issue –

We recently added sitemap.xml v1.04.01 to a 7.8 project, and used the component org.onehippo.forge.sitemap.components.SitemapFeedBasedOnHstSitemap to create the XML feed. The response generated claims to be text/html, while it should be application/xml. We worked around it in the project by prefixing the FTL template with

<#ftl attributes=

/>

but I guess this should really be addressed by the component, setting the response's content type:

response.setContentType("application/xml");

This probably applies to other components of that plugin as well.