Login and Registration: Add `/login.php` as an alias for the login page.

This aims to make the login process more user-friendly.

Follow-up to [19875], [19880].

Props lancewillett, subrataemfluence, tejwanihemant, ankit-k-gupta, devmuhib, audrasjb, hellofromTonya, joemcgill.
Fixes #40762.
Built from https://develop.svn.wordpress.org/trunk@56718


git-svn-id: http://core.svn.wordpress.org/trunk@56230 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/canonical.php

@@ -1028,6 +1028,7 @@ function wp_redirect_admin_locations() {
 
 	$logins = array(
 		home_url( 'wp-login.php', 'relative' ),
+		home_url( 'login.php', 'relative' ),
 		home_url( 'login', 'relative' ),
 		site_url( 'login', 'relative' ),
 	);

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-alpha-56717';
+$wp_version = '6.4-alpha-56718';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.