(proxy) add constraint, closes https://github.com/opnsense/core/issues/1106

src/opnsense/mvc/app/models/OPNsense/Proxy/Proxy.xml

@@ -152,12 +152,26 @@
                     <MinimumValue>1</MinimumValue>
                     <ValidationMessage>Specify the overall bandwidth for downloads in kilobits per second.</ValidationMessage>
                     <Required>N</Required>
+                    <Constraints>
+                        <check001>
+                            <ValidationMessage>Both trotteling parameters should either be filled or empty</ValidationMessage>
+                            <type>OPNsense\Base\Constraints\AllOrNoneConstraint</type>
+                            <addFields>
+                                <field1>perHostTrotteling</field1>
+                            </addFields>
+                        </check001>
+                    </Constraints>
                 </OverallBandwidthTrotteling>
                 <perHostTrotteling type="IntegerField">
                     <default>256</default>
                     <MinimumValue>1</MinimumValue>
                     <ValidationMessage>Specify the per host bandwidth for downloads in kilobits per second.</ValidationMessage>
                     <Required>N</Required>
+                    <Constraints>
+                        <check001>
+                            <reference>OverallBandwidthTrotteling.check001</reference>
+                        </check001>
+                    </Constraints>
                 </perHostTrotteling>
             </traffic>
         </general>