Add replace attribute to Path:

A new build which sets 'replace' for a config file will overwrite the file
installed on the system regardless of its status:

<Path fileType="config" replace="true">/etc/hede.conf</Path>

Tested on a simple install/reinstall, works well.
Should test further with delta updates before applying.

pisi-spec.rng

@@ -1521,6 +1521,14 @@
                     </choice>
                 </attribute>
             </optional>
+            <optional>
+                <attribute name="replace">
+                    <choice>
+                        <value>false</value>
+                        <value>true</value>
+                    </choice>
+                </attribute>
+            </optional>
         </group>
     </define>