Add support for NetBSD network fact (#18113)

Like hostname, it use the same interface as FreeBSD so
we bascailly reuse the same code. Only tested on NetBSD 7.

lib/ansible/module_utils/facts.py

@@ -2876,6 +2876,13 @@ class OpenBSDNetwork(GenericBsdIfconfigNetwork):
     def parse_lladdr_line(self, words, current_if, ips):
         current_if['macaddress'] = words[1]
 
+class NetBSDNetwork(GenericBsdIfconfigNetwork):
+    """
+    This is the NetBSD Network Class.
+    It uses the GenericBsdIfconfigNetwork
+    """
+    platform = 'NetBSD'
+
 class SunOSNetwork(GenericBsdIfconfigNetwork):
     """
     This is the SunOS Network Class.