VHM Support Branch - URL rewriting broken if mapped to the Plone object

[mcarlton00]

Steps to reproduce:

[update-vhm-map-script]
vhm-paths =
    /plone
    /plone/child1
    /plone/child2
vhm-urls =
    http://example.com
    http://child1.example.com
    http://child2.example.com

/plone is a Plone object, while child1/child2 are lineage sites

When viewing a lineage site (child1.example.com) and viewing the web inspector, this causes all styles and resources to be served by example.com instead of the expected child1.example.com.