Multisite: Add a hook to the end of the Add Site form.

The `network_site_new_form` action can be used to extend the new site form.

Props igmoweb, ocean90.
Fixes #34739.

Built from https://develop.svn.wordpress.org/trunk@36555


git-svn-id: http://core.svn.wordpress.org/trunk@36522 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/network/site-new.php

@@ -229,7 +229,17 @@ if ( ! empty( $messages ) ) {
 			<td colspan="2"><?php _e( 'A new user will be created if the above email address is not in the database.' ) ?><br /><?php _e( 'The username and password will be mailed to this email address.' ) ?></td>
 		</tr>
 	</table>
-	<?php submit_button( __('Add Site'), 'primary', 'add-site' ); ?>
+
+	<?php
+	/**
+	 * Fires at the end of the new site form in network admin.
+	 *
+	 * @since 4.5.0
+	 */
+	do_action( 'network_site_new_form' );
+
+	submit_button( __( 'Add Site' ), 'primary', 'add-site' );
+	?>
 	</form>
 </div>
 <?php

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-alpha-36554';
+$wp_version = '4.5-alpha-36555';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.