(proxy) add filter to model and form

(cherry picked from commit 60138461)

src/opnsense/mvc/app/controllers/OPNsense/Proxy/forms/dialogEditBlacklist.xml

@@ -17,6 +17,14 @@
         <type>text</type>
         <help>Enter an url to fetch the blacklist from.</help>
     </field>
+    <field>
+        <id>blacklist.filter</id>
+        <label>filter list</label>
+        <type>text</type>
+        <type>select_multiple</type>
+        <style>tokenize</style>
+        <help><![CDATA[select categories to use, leave empty for all. Categories are visible after initial download.]]></help>
+    </field>
     <field>
         <id>blacklist.description</id>
         <label>Description</label>

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

@@ -237,6 +237,12 @@
                                 <Required>Y</Required>
                                 <ValidationMessage>This does not look like a valid url.</ValidationMessage>
                             </url>
+                            <filter type="JsonKeyValueStoreField">
+                                <Required>N</Required>
+                                <SourceField>filename</SourceField>
+                                <SourceFile>/tmp/%s.index</SourceFile>
+                                <SelectAll>Y</SelectAll>
+                            </filter>
                             <description type="TextField">
                                 <Required>Y</Required>
                                 <mask>/^([\t\n\v\f\r 0-9a-zA-Z.,_\x{00A0}-\x{FFFF}]){1,255}$/u</mask>