Docs: Add missing parameter and return documentation to the DocBlock for the deprecated debug_fopen().

Fixes #32246.


git-svn-id: https://develop.svn.wordpress.org/trunk@36755 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/deprecated.php

@@ -2819,6 +2819,10 @@ function is_blog_user( $blog_id = 0 ) {
  * @see error_log()
  *
  * @link http://www.php.net/manual/en/function.error-log.php
+ *
+ * @param string $filename File name.
+ * @param string $mode     Type of access you required to the stream.
+ * @return false Always false.
  */
 function debug_fopen( $filename, $mode ) {
 	_deprecated_function( __FUNCTION__, 'error_log()' );