erp5_portal_property_sheets: add redirect_to_added_slash property to WebSection

As acquired property, that is Boolean to define if
the 301 redirect would happen when publishing the url without slash

product/ERP5/bootstrap/erp5_property_sheets/PropertySheetTemplateItem/portal_property_sheets/WebSection/redirect_to_added_slash_property.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="Acquired Property" module="erp5.portal_type"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>_local_properties</string> </key>
+            <value>
+              <tuple>
+                <dictionary>
+                  <item>
+                      <key> <string>id</string> </key>
+                      <value> <string>acquisition_depends</string> </value>
+                  </item>
+                  <item>
+                      <key> <string>type</string> </key>
+                      <value> <string>string</string> </value>
+                  </item>
+                </dictionary>
+                <dictionary>
+                  <item>
+                      <key> <string>id</string> </key>
+                      <value> <string>mode</string> </value>
+                  </item>
+                  <item>
+                      <key> <string>type</string> </key>
+                      <value> <string>string</string> </value>
+                  </item>
+                </dictionary>
+              </tuple>
+            </value>
+        </item>
+        <item>
+            <key> <string>acquisition_accessor_id</string> </key>
+            <value> <string>getRedirectToAddedSlash</string> </value>
+        </item>
+        <item>
+            <key> <string>acquisition_base_category</string> </key>
+            <value>
+              <tuple>
+                <string>parent</string>
+              </tuple>
+            </value>
+        </item>
+        <item>
+            <key> <string>acquisition_copy_value</string> </key>
+            <value> <int>0</int> </value>
+        </item>
+        <item>
+            <key> <string>acquisition_depends</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>acquisition_mask_value</string> </key>
+            <value> <int>1</int> </value>
+        </item>
+        <item>
+            <key> <string>acquisition_object_id</string> </key>
+            <value>
+              <tuple/>
+            </value>
+        </item>
+        <item>
+            <key> <string>acquisition_portal_type</string> </key>
+            <value> <string>python: (\'Web Section\', \'Web Site\')</string> </value>
+        </item>
+        <item>
+            <key> <string>alt_accessor_id</string> </key>
+            <value>
+              <tuple/>
+            </value>
+        </item>
+        <item>
+            <key> <string>categories</string> </key>
+            <value>
+              <tuple>
+                <string>elementary_type/boolean</string>
+              </tuple>
+            </value>
+        </item>
+        <item>
+            <key> <string>content_acquired_property_id</string> </key>
+            <value>
+              <tuple/>
+            </value>
+        </item>
+        <item>
+            <key> <string>content_translation_acquired_property_id</string> </key>
+            <value>
+              <tuple/>
+            </value>
+        </item>
+        <item>
+            <key> <string>description</string> </key>
+            <value> <string>In case the Web Section is published without slash in url, raise 301 redirect to the same url with slash added\n
+</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>redirect_to_added_slash_property</string> </value>
+        </item>
+        <item>
+            <key> <string>mode</string> </key>
+            <value> <string></string> </value>
+        </item>
+        <item>
+            <key> <string>portal_type</string> </key>
+            <value> <string>Acquired Property</string> </value>
+        </item>
+        <item>
+            <key> <string>property_default</string> </key>
+            <value> <string>python: 0</string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>