Log Message:
Update to version 1.5, by Shaun Amott in PR#34492.

Changes since 1.4:

    * Converted to automake/autoconf for configuration, which should make
      it easier to extend portability.
    * Added support for checking multiple addresses in one invokation.
    * Added support for reading addresses to check from standard input, by
      specifying an argument of '-'.
    * Changed rbl.dorkslayers.com to relays.orbs.org, due to a change in
      management.