Multisite: Correct the docs for `maybe_add_existing_user_to_blog()`.

See #41017

Built from https://develop.svn.wordpress.org/trunk@41552


git-svn-id: http://core.svn.wordpress.org/trunk@41385 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/ms-functions.php

@@ -2069,10 +2069,10 @@ function maybe_redirect_404() {
 }
 
 /**
- * Add a new user to a blog by visiting /newbloguser/username/.
+ * Add a new user to a blog by visiting /newbloguser/{key}/.
  *
  * This will only work when the user's details are saved as an option
- * keyed as 'new_user_x', where 'x' is the username of the user to be
+ * keyed as 'new_user_{key}', where '{key}' is a hash generated for the user to be
  * added, as when a user is invited through the regular WP Add User interface.
  *
  * @since MU (3.0.0)

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-41551';
+$wp_version = '4.9-alpha-41552';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.