Azure Firewall Support of Private IP Ranges in IDPS (#18320)

* Azure Firewall Support of Private IP Ranges in IDPS

* make sure all arrays have x-ms-identifiers

* FirewallPolicy not Firewall policy

fix spellcheck validation

specification/network/resource-manager/Microsoft.Network/stable/2021-08-01/firewallPolicy.json

@@ -1652,6 +1652,14 @@
             "$ref": "#/definitions/FirewallPolicyIntrusionDetectionBypassTrafficSpecifications"
           },
           "x-ms-identifiers": []
+        },
+        "privateIpRanges": {
+          "type": "array",
+          "description": "IDPS Private IP address ranges are used to identify traffic direction (i.e. inbound, outbound, etc.). By default, only ranges defined by IANA RFC 1918 are considered private IP addresses. To modify default ranges, specify your Private IP address ranges with this property",
+          "items": {
+            "type": "string"
+          },
+          "x-ms-identifiers": []
         }
       }
     },
@@ -1957,7 +1965,7 @@
             2
           ],
           "x-ms-enum": {
-            "name": "FirewallpolicyIDPSSignatureDirection",
+            "name": "FirewallPolicyIDPSSignatureDirection",
             "modelAsString": false
           }
         },