Add phpDoc references for project documentation settings

config_defaults_inc.php

@@ -865,6 +865,8 @@
  * Specifies whether to enable support for project documents or not.
  * This feature is deprecated and is expected to be moved to a plugin
  * in the future.
+ * @see $g_view_proj_doc_threshold
+ * @see $g_upload_project_file_threshold
  * @global integer $g_enable_project_documentation
  */
 $g_enable_project_documentation = OFF;
@@ -2665,7 +2667,10 @@
 /**
  * access level needed to upload files to the project documentation section
  * You can set this to NOBODY to prevent uploads to projects
- * See also: $g_upload_bug_file_threshold, $g_allow_file_upload
+ * @see $g_enable_project_documentation
+ * @see $g_view_proj_doc_threshold
+ * @see $g_allow_file_upload
+ * @see $g_upload_bug_file_threshold
  * @global integer $g_upload_project_file_threshold
  */
 $g_upload_project_file_threshold = MANAGER;