slightly changed super-admin mail text

Signed-off-by: Sweil <mail@sweil.de>
some fixes on jobs and files

Signed-off-by: Sweil <mail@sweil.de>
fixed bugs
added secret option to use url wrappers for ftp connection.
adjusted jobs
added possibility to skip fileops

Signed-off-by: Sweil <mail@sweil.de>
added many forgotten references to new Files class

Signed-off-by: Sweil <mail@sweil.de>
missing Files:: in InstallerFunctions.php
cleared db_connection.php

Signed-off-by: Sweil <mail@sweil.de>
scandir etc. not url-wrapped because of ftps bug

Signed-off-by: Sweil <mail@sweil.de>