Add rule MissingEncoding (XML) (#90)

Refs pmd/pmd#5954

Author: adangel

pom.xml

@@ -56,6 +56,12 @@
                 <version>${pmd.version}</version>
                 <scope>test</scope>
             </dependency>
+            <dependency>
+                <groupId>net.sourceforge.pmd</groupId>
+                <artifactId>pmd-xml</artifactId>
+                <version>${pmd.version}</version>
+                <scope>test</scope>
+            </dependency>
             <dependency>
                 <groupId>net.sourceforge.pmd</groupId>
                 <artifactId>pmd-test</artifactId>
@@ -102,6 +108,11 @@
             <artifactId>pmd-java</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>net.sourceforge.pmd</groupId>
+            <artifactId>pmd-xml</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>net.sourceforge.pmd</groupId>
             <artifactId>pmd-test</artifactId>

src/main/resources/net/sourceforge/pmd/pmd-dogfood-config.xml

@@ -511,6 +511,9 @@
 
     <!--     <rule ref="category/java/security.xml/InsecureCryptoIv" /> -->
 
+    <rule ref="category/xml/bestpractices.xml/MissingEncoding">
+        <priority>1</priority>
+    </rule>
 
     <!-- Note: These are the custom rule ported to PMD 7 -->