There are no more lang vars passed on to any class calls
The new order is the following
$OVERRIDE_LANG > _SESSION > SITE_LANG > DEFAULT_LANG
Todo: make the setLang better so we do not have the same method in
Backend/Generic/SmartyExtended
DB\IO dbReturn method has a third parameter to set read only assoc and
not number data from the query
Install basic composer for trying out psalm
setting phpan/phpstan for basic static checking and do basic clean up on
all of the files
Because .inc style is deprecated and also dangerious as often not setup
correctly on the server all .inc files have been renamed to .php files.
All internall calls have been udpated.
