bundle agent system_files
{
  files:
      "$(sys.resolv)"  # test on "/tmp/resolv.conf" #
      comment       => "Add lines to the resolver configuration",
      create        => "true",
      edit_line     => resolver,
      edit_defaults => std_edits;
      # ...other system files ...

}
#######################################################

bundle edit_line resolver
{
  delete_lines:
      # delete any old name servers or junk we no longer need

      "search.*";
      "nameserver 80.65.58.31";
      "nameserver 80.65.58.32";
      "nameserver 82.103.128.146";
      "nameserver 78.24.145.4";
      "nameserver 78.24.145.5";
      "nameserver 128.39.89.10";

  insert_lines:
      "search mydomain.tld" location => start;
    special_net::
      "nameserver 128.39.89.8";
      "nameserver 128.39.74.66";
    !special_net::
      "nameserver 128.38.34.12";
    any::
      "nameserver 212.112.166.18";
      "nameserver 212.112.166.22";
}