added missing files to git repo

Added missing files from PolicyKit 0.4 release package to the
git repo: data/PolicyKit.conf.in, data/config.dtd

data/PolicyKit.conf.in

+<?xml version="1.0" encoding="UTF-8"?> <!-- -*- XML -*- -->
+
+<!DOCTYPE pkconfig PUBLIC "-//freedesktop//DTD PolicyKit Configuration 1.0//EN"
+"http://hal.freedesktop.org/releases/PolicyKit/1.0/config.dtd">
+
+<!-- See the manual page PolicyKit.conf(5) for file format -->
+
+<config version="0.1">
+</config>

data/config.dtd

+<!-- Document Type for PolicyKit configuration file -->
+
+<!-- <config> is the top-level element of the config file. -->
+<!ELEMENT config (match|return)* >
+<!ATTLIST config 
+    version (0.1) #REQUIRED
+>
+
+<!ELEMENT match (match|return)* >
+<!ATTLIST match 
+          action     CDATA #IMPLIED
+          user       CDATA #IMPLIED
+>
+
+<!ELEMENT return (#PCDATA) >
+<!ATTLIST return
+          result    (no|auth_root|auth_root_keep_session|auth_root_keep_always|auth_self|auth_self_keep_session|auth_self_keep_always|yes) #REQUIRED
+>