<issue_start><issue_comment>Title: Update xdebug pecl extension to latest stable version
username_0: We have this hard coded to the latest release candidate in the Dockerfiles of fpm and cli.  When this goes stable then we should upgrade to the latest stable version.
<issue_comment>username_0: Xdebug 2.4.0 stable has been released - https://xdebug.org/updates.php#x_2_4_0<issue_closed>