- use clientdb config for addon sql files

- do not install/update addons during install/update of ISPconfig. This only leads to lots of trouble

- do not install/update addons during install/update of ISPconfig. This only leads to lots of trouble

- TODO: the server services plugin is not capable of enabling and disabling addon plugins, yet

- removed line that drops the ISPConfig database (and was not executed before due to a sql syntax error)

- improved rspamd handling

Update installer_base.lib.php to replace ssl on / off that is already deprecated in Nginx 1.15 with ' ssl' / '' and to change the same in nginx_ispconfig.vhost.master as well.

Add description text for logging options.

Optimized prosody configuration for full conversations.im feature compartibility including full OMEMO support

Disabled sql-mode check in updater.

- Fixed #5027 add support for PHP 7.1 and 7.2 on nginx servers in apps vhost.
- suppress some warnings in simplepie.inc.php