PR 56603:  Inappropiate ProxyPassReverse match when interpolated URL 
is empty string 

Submitted By: <ajprout hotmail.com>
Committed By: covener



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1648433 13f79535-47bb-0310-9956-ffa450edef68