saving uncommitted changes in /etc prior to emerge run

libvirt/storage/autostart/default.xml

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+/etc/libvirt/storage/default.xml

libvirt/storage/default.xml

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+<!--
+WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
+OVERWRITTEN AND LOST. Changes to this xml configuration should be made using:
+  virsh pool-edit default
+or other application using the libvirt API.
+-->
+
+<pool type='dir'>
+  <name>default</name>
+  <uuid>f1c0096a-c2ec-1b41-1aa2-570760c5c1a4</uuid>
+  <capacity unit='bytes'>0</capacity>
+  <allocation unit='bytes'>0</allocation>
+  <available unit='bytes'>0</available>
+  <source>
+  </source>
+  <target>
+    <path>/var/lib/libvirt/images</path>
+    <permissions>
+      <mode>0755</mode>
+      <owner>-1</owner>
+      <group>-1</group>
+    </permissions>
+  </target>
+</pool>