Index: src/wp-includes/ms-functions.php
===================================================================
--- src/wp-includes/ms-functions.php	(revision 43821)
+++ src/wp-includes/ms-functions.php	(working copy)
@@ -1850,13 +1850,10 @@
 }
 
 /**
- * Check an array of MIME types against a whitelist.
+ * Checks an array of MIME types against a whitelist for the current network.
  *
- * WordPress ships with a set of allowed upload filetypes,
- * which is defined in wp-includes/functions.php in
- * get_allowed_mime_types(). This function is used to filter
- * that list against the filetype whitelist provided by Multisite
- * Super Admins at wp-admin/network/settings.php.
+ * Primarily used in conjunction with the {@see 'upload_mimes'} hook to ensure
+ * upload mime types match up with the whitelist provided by Multisite Super Admins.
  *
  * @since MU (3.0.0)
  *