build the socket address first, then get a matching socket

that resolves an issue where sockaddr_get would return an
AF_INET6/IPv6 address that we'd try to bind to an AF_INET/IPv4
socket


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@934052 13f79535-47bb-0310-9956-ffa450edef68