Use new docmaker syntax for identifiers with identical names.

include/freetype/ftautoh.h

@@ -442,7 +442,7 @@ FT_BEGIN_HEADER
   /**************************************************************************
    *
    * @property:
-   *   no-stem-darkening
+   *   no-stem-darkening[autofit]
    *
    * @description:
    *   *Experimental* *only*
@@ -478,7 +478,7 @@ FT_BEGIN_HEADER
   /**************************************************************************
    *
    * @property:
-   *   darkening-parameters
+   *   darkening-parameters[autofit]
    *
    * @description:
    *   *Experimental* *only*
@@ -486,7 +486,7 @@ FT_BEGIN_HEADER
    *   See the description of the CFF driver for details.  This
    *   implementation appropriates the
    *   CFF_CONFIG_OPTION_DARKENING_PARAMETER_* #defines for consistency.
-   *   Note the differences described in @no-stem-darkening.
+   *   Note the differences described in @no-stem-darkening[autofit].
    *
    */
 

include/freetype/ftcffdrv.h

@@ -111,8 +111,8 @@ FT_BEGIN_HEADER
    *
    * @order:
    *   hinting-engine
-   *   no-stem-darkening
-   *   darkening-parameters
+   *   no-stem-darkening[cff]
+   *   darkening-parameters[cff]
    *
    */
 
@@ -175,7 +175,7 @@ FT_BEGIN_HEADER
   /**************************************************************************
    *
    * @property:
-   *   no-stem-darkening
+   *   no-stem-darkening[cff]
    *
    * @description:
    *   By default, the Adobe CFF engine darkens stems at smaller sizes,
@@ -205,7 +205,7 @@ FT_BEGIN_HEADER
   /**************************************************************************
    *
    * @property:
-   *   darkening-parameters
+   *   darkening-parameters[cff]
    *
    * @description:
    *   By default, the Adobe CFF engine darkens stems as follows (if the