More tripwire fixes

src/freedombone

   sed -i 's|/proc.*||g' /etc/tripwire/twpol.txt
   # Don't report log changes
   sed -i 's|/var/log.*||g' /etc/tripwire/twpol.txt
+  # Ignore /etc/tripwire
+  if ! grep -q "!/etc/tripwire" /etc/tripwire/twpol.txt; then
+	  sed -i '\|/etc\t\t->.*|a\        !/etc/tripwire;' /etc/tripwire/twpol.txt
+  fi
+  # Avoid logging the changed database
+  sed -i 's|$(TWETC)/tw.pol.*||g' /etc/tripwire/twpol.txt
   reset-tripwire
 
   echo 'intrusion_detection' >> $COMPLETION_FILE