Dutch translation

See merge request ispconfig/ispconfig3!921

Helmo authored Sep 24, 2019 and Till Brehm committed Sep 24, 2019

Some form of inheritance might be nice to reduce the amount of duplication in these files.

Check explicitly for session username, fixes #5389

See merge request ispconfig/ispconfig3!922

Added option to select Local Mail server for remote email accounts import

See merge request ispconfig/ispconfig3!924

- ignore @/*@ targets for spamfilter_user in rspamd plugin

updated to recognize newer Centos 7 releases & to recognize recent openSUSE even if not supported

See merge request ispconfig/ispconfig3!919

Add missing API doc for sites_aps_change_package_status

See merge request ispconfig/ispconfig3!917

Don't try to load non-existing config in aps remote, fixes #4974

See merge request ispconfig/ispconfig3!913

Force equal passwords in APS installer before form can be posted

See merge request ispconfig/ispconfig3!912

Load APS language file for APS instance list

See merge request ispconfig/ispconfig3!915

Fix APS package list table

See merge request ispconfig/ispconfig3!916

Minor language change for APS installer

See merge request ispconfig/ispconfig3!914

Fixed PHP Warning:  Undefined property wb of class app in /usr/local/ispconfig/interface/lib/app.inc.php on line 81

Fixed ISPConfig server log warning:  Unable to add a delayed restart for 'postfix'. Service not registered.

Added test script for dns_templatezone_add remote API function

- removed separate rspamd greylisting setting for policy and respect mail user/alias/forward/catchall setting for greylisting, fixes #5379