Merge branch '45-new-subsection-in-ldap-schema-fusiondirectory-attribute-finder' into '1.3'

Resolve "new subsection in ldap schema "FusionDirectory attribute finder""

Closes #45

See merge request fusiondirectory/dev-manual!72

source/schemas/index.rst

@@ -9,4 +9,5 @@ If your plugin needs a new schema or stores data in config back-end, the followi
    schemaname
    numberrules
    namerules
+   schemaweb
    iana

source/schemas/schemaweb.rst

+FusionDirectory attribute & Objectclass finder
+==============================================
+
+To be able to find at wich version an attribute / objectclass has been added / deprecated or removed we wrote a web application that allow you to search based on various criteria.
+
+Those criteria are :
+
+ * Attributes
+ * ObjectClass
+ * Release
+ * Schemas
+
+The application is available on `Schema <https://schemas.fusiondirectory.info/>`_