Added FALLBACK index

Author: PatrikSylve

en/mapfile/class.txt

@@ -93,8 +93,8 @@ EXPRESSION [string]
         |RUNSUB|
 
 .. index::
-   pair: CLASS; GROUP
-   :name: mapfile-class-group
+   pair: CLASS; FALLBACK
+   :name: mapfile-class-fallback
 
 FALLBACK [true|false]
     Specifies whether the class should act as a fallback class.
@@ -103,6 +103,10 @@ FALLBACK [true|false]
     the :ref:`sld` ElseFilter.
    .. versionadded:: 8.5
 
+.. index::
+   pair: CLASS; GROUP
+   :name: mapfile-class-group
+
 GROUP [string]
     Allows for grouping of classes.  It is only used when a
     `CLASSGROUP` at the :ref:`LAYER` level is set. If the `CLASSGROUP`

en/ogc/sld.txt

@@ -792,7 +792,7 @@ Other Items Implemented
   - Referencing an SLD file in the LAYER :ref:`STYLEITEM <mapfile-layer-styleitem>`
   - Reading SLD strings when from an attribute defined in the LAYER :ref:`STYLEITEM <mapfile-layer-styleitem>`
 
-- Added the `FALLBACK` keyword in :ref:`CLASS` to support the functionality of `ElseFilter` in SLD.
+- Added the `FALLBACK` keyword in :ref:`CLASS <mapfile-class-fallback>` to support the functionality of `ElseFilter` in SLD.
 
 Issues Found During Implementation
 ==================================