Multisite: Add translator comments to default email messages with non-typical placeholders.

props yoavf.
fixes #32263.
Built from https://develop.svn.wordpress.org/trunk@32381


git-svn-id: http://core.svn.wordpress.org/trunk@32351 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/ms.php

@@ -253,6 +253,7 @@ function update_option_new_admin_email( $old_value, $value ) {
 	);
 	update_option( 'adminhash', $new_admin_email );
 
+	/* translators: Do not translate USERNAME, ADMIN_URL, EMAIL, SITENAME, SITEURL: those are placeholders. */
 	$email_text = __( 'Howdy ###USERNAME###,
 
 You recently requested to have the administration email address on
@@ -334,6 +335,7 @@ function send_confirmation_on_profile_email() {
 				);
 		update_option( $current_user->ID . '_new_email', $new_user_email );
 
+		/* translators: Do not translate USERNAME, ADMIN_URL, EMAIL, SITENAME, SITEURL: those are placeholders. */
 		$email_text = __( 'Howdy ###USERNAME###,
 
 You recently requested to have the email address on your account changed.

wp-admin/includes/schema.php

@@ -917,6 +917,7 @@ function populate_network( $network_id = 1, $domain = '', $email = '', $site_nam
 		$site_admins = get_site_option( 'site_admins' );
 	}
 
+	/* translators: Do not translate USERNAME, SITE_NAME, BLOG_URL, PASSWORD: those are placeholders. */
 	$welcome_email = __( 'Howdy USERNAME,
 
 Your new SITE_NAME site has been successfully set up at:

wp-admin/ms-delete-site.php

@@ -42,6 +42,7 @@ if ( isset( $_POST['action'] ) && $_POST['action'] == 'deleteblog' && isset( $_P
 
 	$url_delete = esc_url( admin_url( 'ms-delete-site.php?h=' . $hash ) );
 
+	/* translators: Do not translate USERNAME, URL_DELETE, SITE_NAME: those are placeholders. */
 	$content = __( "Howdy ###USERNAME###,
 
 You recently clicked the 'Delete Site' link on your site and filled in a