message: Add NetworkRuleSet Support.
diff: "customSubDomainName": {
  "type": "string",
  "description": "Optional subdomain name used for token-based authentication."
  + },
  + "networkAcls": {
  + "$ref": "#/definitions/NetworkRuleSet",
  + "description": "A collection of rules governing the accessibility from specific network locations."
  }
  },
  "description": "Properties of Cognitive Services account."
  "value"
  ],
  "description": "The Get Skus operation response."
  + },
  + "NetworkRuleSet": {
  + "properties": {
  + "bypass": {
  + "type": "string",
  + "description": "Tells what traffic can bypass network rules. This can be 'AzureServices' or 'None'. If not specified the default is 'AzureServices'.",
  + "enum": [
  + "AzureServices",
  + "None"
  + ],
  + "x-ms-enum": {
  + "name": "NetworkRuleBypassOptions",
  + "modelAsString": true
  + }
  + },
  + "defaultAction": {
  + "type": "string",
  + "description": "The default action when no rule from ipRules and from virtualNetworkRules match. This is only used after the bypass property has been evaluated.",
  + "enum": [
  + "Allow",
  + "Deny"
  + ],
  + "x-ms-enum": {
  + "name": "NetworkRuleAction",
  + "modelAsString": true
  + }
  + },
  + "ipRules": {
  + "type": "array",
  + "items": {
  + "$ref": "#/definitions/IpRule"
  + },
  + "description": "The list of IP address rules."
  + },
  + "virtualNetworkRules": {
  + "type": "array",
  + "items": {
  + "$ref": "#/definitions/VirtualNetworkRule"
  + },
  + "description": "The list of virtual network rules."
  + }
  + },
  + "description": "A set of rules governing the network accessibility."
  + },
  + "IpRule": {
  + "properties": {
  + "value": {
  + "type": "string",
  + "description": "An IPv4 address range in CIDR notation, such as '124.56.78.91' (simple IP address) or '124.56.78.0/24' (all addresses that start with 124.56.78)."
  + }
  + },
  + "required": [
  + "value"
  + ],
  + "description": "A rule governing the accessibility from a specific ip address or ip range."
  + },
  + "VirtualNetworkRule": {
  + "properties": {
  + "id": {
  + "type": "string",
  + "description": "Full resource id of a vnet subnet, such as '/subscriptions/subid/resourceGroups/rg1/providers/Microsoft.Network/virtualNetworks/test-vnet/subnets/subnet1'."
  + },
  + "state": {
  + "type": "string",
  + "description": "Gets the state of virtual network rule."
  + },
  + "ignoreMissingVnetServiceEndpoint": {
  + "type": "boolean",
  + "description": "Ignore missing vnet service endpoint or not."
  + }
  + },
  + "required": [
  + "id"
  + ],
  + "description": "A rule governing the accessibility from a specific virtual network."
  }
  },
  "parameters": {
  