Support listening on multiple addresses via a single Listen/Port line.

Support listening on multiple addresses via a single Listen/Port line.

scheduler/conf.c:
    - get_address(): Changed to return an address list, and to
      automatically create an IPv4 address on the "any" address
      when running on OpenBSD.
    - read_configuration(): Use address lists from get_address(),
      and redo BrowsePoll to just extract the hostname and
      port(name), rather than doing a lookup - the cups-polld
      program can do that.

git-svn-id: svn+ssh://src.apple.com/svn/cups/cups.org/trunk@4758 7a7537e8-13f0-0310-91df-b6672ffda945