(netflow) add acl and menu registration

src/opnsense/mvc/app/models/OPNsense/Diagnostics/ACL/ACL.xml

@@ -40,4 +40,12 @@
             <pattern>api/diagnostics/systemhealth/*</pattern>
         </patterns>
     </page-diagnostics-health>
+    <page-diagnostics-netflow>
+        <name>WebCfg - Diagnostics: Netflow configuration</name>
+        <description>Allows access to the Netflow configuration</description>
+        <patterns>
+            <pattern>ui/diagnostics/netflow/*</pattern>
+            <pattern>api/diagnostics/netflow/*</pattern>
+        </patterns>
+    </page-diagnostics-netflow>
 </acl>

src/opnsense/mvc/app/models/OPNsense/Diagnostics/Menu/Menu.xml

@@ -7,6 +7,9 @@
         <Routes>
             <Status order="20" url="/ui/diagnostics/interface/routes/"/>
         </Routes>
+        <Settings>
+          <Netflow order="1000" VisibleName="NetFlow" url="/ui/diagnostics/netflow/"/>
+        </Settings>
     </System>
     <Interfaces>
         <Diagnostics>