Add new action 'delete_user_form' in `wp-admin/users.php` and `wp-admin/network/users.php`.

Props SergeyBiryukov, usermrpapa.
Fixes #27230.

Built from https://develop.svn.wordpress.org/trunk@28885


git-svn-id: http://core.svn.wordpress.org/trunk@28684 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/network/users.php

@@ -77,6 +77,9 @@ function confirm_delete_users( $users ) {
 		}
 	}
 
+	/** This action is documented in wp-admin/users.php */
+	do_action( 'delete_user_form', $current_user );
+
 	submit_button( __('Confirm Deletion'), 'delete' );
 	?>
 	</form>

wp-admin/users.php

@@ -244,6 +244,16 @@ case 'delete':
 		<?php echo '<label for="delete_option1">' . __( 'Attribute all content to:' ) . '</label> ';
 		wp_dropdown_users( array( 'name' => 'reassign_user', 'exclude' => array_diff( $userids, array($current_user->ID) ) ) ); ?></li>
 	</ul></fieldset>
+	<?php
+	/**
+	 * Fires at the end of the delete users form prior to the confirm button.
+	 *
+	 * @since 4.0.0 
+	 *
+	 * @param WP_User $current_user WP_User object for the user being deleted.
+	 */
+	do_action( 'delete_user_form', $current_user );
+	?>
 	<input type="hidden" name="action" value="dodelete" />
 	<?php submit_button( __('Confirm Deletion'), 'secondary' ); ?>
 <?php else : ?>