ipadnszone: Fix values accepted by allow_transfer and allow_query.

In FreeIPA CLI, The attributes `allow_query` and `allow_transfer` can
hold IPv4 or IPv6 address or network address, and the values `none` and
`any`.

This patch adds support for network addresses, `none` and `any`, which
were not supported.

Fix issue #475.

plugins/module_utils/ansible_freeipa_module.py

@@ -28,6 +28,7 @@ import os
 import uuid
 import tempfile
 import shutil
+import netaddr
 import gssapi
 from datetime import datetime
 from pprint import pformat
@@ -413,6 +414,24 @@ def is_valid_port(port):
     return False
 
 
+def is_ip_address(ipaddr):
+    """Test if given IP address is a valid IPv4 or IPv6 address."""
+    try:
+        netaddr.IPAddress(str(ipaddr))
+    except (netaddr.AddrFormatError, ValueError):
+        return False
+    return True
+
+
+def is_ip_network_address(ipaddr):
+    """Test if given IP address is a valid IPv4 or IPv6 address."""
+    try:
+        netaddr.IPNetwork(str(ipaddr))
+    except (netaddr.AddrFormatError, ValueError):
+        return False
+    return True
+
+
 def is_ipv4_addr(ipaddr):
     """Test if given IP address is a valid IPv4 address."""
     try: