Get the correct IP address if ServerName isn't set and we can't

find a fully-qualified domain name at startup.
PR:             7170
Submitted by:   Danek Duvall <dduvall@eng.sun.com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@87938 13f79535-47bb-0310-9956-ffa450edef68