Add license exception for db5.3

The package db5.3 uses Spleepycat license which could be potentially
problematic in some contexts, so add an entry to explain the situation
in policy section.

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

content/policies/license-exceptions.md

@@ -300,3 +300,46 @@ Each exception must provide the following information:
   </td>
 </tr>
 </table>
+
+## libdb5.3
+
+<table>
+<colgroup>
+  <col style="width: 20%" />
+  <col style="width: 80%" />
+</colgroup>
+<tr>
+  <th>project</th>
+  <td>db5.3</td>
+</tr>
+<tr>
+  <th>component</th>
+  <td>apertis:*:target</td>
+</tr>
+<tr>
+  <th>date</th>
+  <td>December  28, 2022</td>
+</tr>
+<tr>
+  <th>validator</th>
+  <td>wlozano</td>
+</tr>
+<tr>
+  <th>rule</th>
+  <td>Sleepycat license</td>
+</tr>
+<tr>
+  <th>reason</th>
+  <td>
+   <p><code>libdb5.3</code> uses <a href="https://spdx.org/licenses/Sleepycat.html">Sleepcat License</a>
+    which states that information on how to obtain complete source code for the DB software
+    and any accompanying software that <b>uses the DB software</b>. Based on the interpretation of
+    <b>uses</b> in this context, different restrictions apply.
+   </p>
+   <p>
+    Based on these facts, libdb5.3 package can be used by Open Source components, but Private
+    components should be aware of possible restrictions.
+   </p>
+  </td>
+</tr>
+</table>