* For retriggering a DNS lookup worker->cp->addr should be set to NULL and thus
  we need to avoid a race that worker->cp->addr switches to NULL after we
  checked it to be non NULL but before we assign it to conn->addr in an else
  tree which would leave conn->addr to NULL and likely cause a segfault later.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1909400 13f79535-47bb-0310-9956-ffa450edef68
