Help: Improve OUTPUT_NAME documentation formatting

Also link to its variants.

Help/prop_tgt/CONFIG_OUTPUT_NAME.rst

@@ -2,6 +2,7 @@
 --------------------
 
 Old per-configuration target file base name.
+Use :prop_tgt:`OUTPUT_NAME_<CONFIG>` instead.
 
-This is a configuration-specific version of OUTPUT_NAME.  Use
-OUTPUT_NAME_<CONFIG> instead.
+This is a configuration-specific version of the :prop_tgt:`OUTPUT_NAME`
+target property.

Help/prop_tgt/OUTPUT_NAME.rst

@@ -6,3 +6,13 @@ Output name for target files.
 This sets the base name for output files created for an executable or
 library target.  If not set, the logical target name is used by
 default.
+
+See also the variants:
+
+* :prop_tgt:`OUTPUT_NAME_<CONFIG>`
+* :prop_tgt:`ARCHIVE_OUTPUT_NAME_<CONFIG>`
+* :prop_tgt:`ARCHIVE_OUTPUT_NAME`
+* :prop_tgt:`LIBRARY_OUTPUT_NAME_<CONFIG>`
+* :prop_tgt:`LIBRARY_OUTPUT_NAME`
+* :prop_tgt:`RUNTIME_OUTPUT_NAME_<CONFIG>`
+* :prop_tgt:`RUNTIME_OUTPUT_NAME`

Help/prop_tgt/OUTPUT_NAME_CONFIG.rst

@@ -3,4 +3,5 @@ OUTPUT_NAME_<CONFIG>
 
 Per-configuration target file base name.
 
-This is the configuration-specific version of OUTPUT_NAME.
+This is the configuration-specific version of the :prop_tgt:`OUTPUT_NAME`
+target property.