backport from trunk:

  mod_auth_digest: Fix hostinfo validation for CONNECT requests.

Submitted by: jorton
Reviewed by: nd, jerenkrantz


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x@280126 13f79535-47bb-0310-9956-ffa450edef68