Multisite: Add hook before a new user is created during the creation of a new site.

New `network_site_new_created_user_pending` action fires before a new user will be created via the network site-new.php page. 

Props mackensen
Fixes #33631

Built from https://develop.svn.wordpress.org/trunk@35786


git-svn-id: http://core.svn.wordpress.org/trunk@35750 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/network/site-new.php

@@ -90,6 +90,15 @@ if ( isset($_REQUEST['action']) && 'add-site' == $_REQUEST['action'] ) {
 	$password = 'N/A';
 	$user_id = email_exists($email);
 	if ( !$user_id ) { // Create a new user with a random password
+		/**
+		 * Fires when a new user will be created via the network site-new.php page.
+		 *
+		 * @since 4.5.0
+		 *
+		 * @param string $email Email of the non-existent user.
+		 */
+		do_action( 'network_site_new_created_user_pending', $email );
+
 		$user_id = username_exists( $domain );
 		if ( $user_id ) {
 			wp_die( __( 'The domain or path entered conflicts with an existing username.' ) );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-35785';
+$wp_version = '4.5-alpha-35786';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.