Allow manual ESI Includes on non-HST navigational servlet/jsp URLs

Eduardo Suarez found this issue. (Thanks a lot!)

If you set the following options in hst-config.properties to enable manual esi includes, ESI Inclusion on HST Navigation URLs doesn't work. Manual ESI Inclusion on HST Resource URLs still work though.

Here's a reproduction step:

(1) Set the following in hst-config.properties:

1. Flag whether or not ESI fragments should be processed
   esi.default.fragments.processing = true
2. Flag whether or not ESI processing only for async comp
   esi.processing.condition.async.components = false

(2) Add 'esifragment' hst page definition:
<sv:node sv:name="esifragment">
<sv:property sv:name="jcr:primaryType" sv:type="Name">
<sv:value>hst:component</sv:value>
</sv:property>
<sv:property sv:name="hst:template" sv:type="String">
<sv:value>esifragment</sv:value>
</sv:property>
</sv:node>

(3) Add 'esifragment' template:
<sv:node sv:name="esifragment">
<sv:property sv:name="jcr:primaryType" sv:type="Name">
<sv:value>hst:template</sv:value>
</sv:property>
<sv:property sv:name="hst:renderpath" sv:type="String">
<sv:value>jsp/components/footer/open-position-within-hippo.jsp</sv:value>
</sv:property>
</sv:node>

(4) Add 'esifragment' sitemap item:
<sv:node sv:name="esifragment">
<sv:property sv:name="jcr:primaryType" sv:type="Name">
<sv:value>hst:sitemapitem</sv:value>
</sv:property>
<sv:property sv:name="hst:componentconfigurationid" sv:type="String">
<sv:value>hst:pages/esifragment</sv:value>
</sv:property>
</sv:node>

(5) Add the following in resources/src/main/webapp/WEB-INF/jsp/components/footer/footer.jsp:
<div id="ft">
<!-- SNIP -->
<p>
BEGIN ESI INCLUDE –
<esi:include src="http://localhost:8080/site/esifragment"/>
– END ESI INCLUDE
</p>
</div>

Even though the hit on http://localhost:8080/site/esifragment shows some text only, the include result by the above esi include element contains the homepage output.

[1] https://svn.onehippo.org/repos/hippo/hippo-cms7/testsuite