DHCPv4 option 21 policy-filter example may be misleading

Example of that Option that is currently in the source code (all-options.json) may be misleading.

      /*
       Code   Len         Address 1                  Mask 1
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
      |  21 |  n  |  a1 |  a2 |  a3 |  a4 |  m1 |  m2 |  m3 |  m4 |
      +-----+-----+-----+-----+-----+-----+-----+-----+-----+-----+
              Address 2                  Mask 2
      +-----+-----+-----+-----+-----+-----+-----+-----+---
      |  a1 |  a2 |  a3 |  a4 |  m1 |  m2 |  m3 |  m4 | ...
      +-----+-----+-----+-----+-----+-----+-----+-----+---
      */
      // Type: array of {IPv4 address}
      {
        "code": 21,
        "data": "192.0.2.21, 192.0.2.22",
        "name": "policy-filter"
      },

data should be rather pairs of (IPv4, mask), e.g.

        "data": "192.0.2.0, 255.255.255.0",

or

        "data": "192.0.2.0, 255.255.255.0, 10.2.0.0, 255.255.0.0",