Multisite: Use a numbered placeholder in `sprintf()` for the site URL.

Fixes missing site domain in the link and a PHP warning.

Merge of [42844] to the 4.9 branch.

Props Thomas Vitale, conner_bw.
See #41645, #43568.
Built from https://develop.svn.wordpress.org/branches/4.9@42845


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42675 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-activate.php

@@ -110,7 +110,7 @@ get_header( 'wp-activate' );
 					printf(
 						/* translators: 1: site URL, 2: username, 3: user email, 4: lost password URL */
 						__( 'Your site at %1$s is active. You may now log in to your site using your chosen username of &#8220;%2$s&#8221;. Please check your email inbox at %3$s for your password and login instructions. If you do not receive an email, please check your junk or spam folder. If you still do not receive an email within an hour, you can <a href="%4$s">reset your password</a>.' ),
-						sprintf( '<a href="http://%s">%s</a>', $signup->domain ),
+						sprintf( '<a href="http://%1$s">%1$s</a>', $signup->domain ),
 						$signup->user_login,
 						$signup->user_email,
 						wp_lostpassword_url()

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9.5-alpha-42842';
+$wp_version = '4.9.5-alpha-42845';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.