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.dtd

@@ -117,6 +117,7 @@ suck anyway -->
 	(executable|library|data|config|doc|man|info|localedata|header)
 	#REQUIRED>
 <!ATTLIST Path permanent (false|true) #IMPLIED>
+<!ATTLIST Path replace (false|true) #IMPLIED>
 
 
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