Merge branch 'feature/installation-and-configuration-cleanup-5638'
Conflicts:
config/config.ini.in
library/Icinga/Application/ApplicationBootstrap.php
library/Icinga/Application/Cli.php
library/Icinga/Application/EmbeddedWeb.php
library/Icinga/Application/Logger.php
library/Icinga/Application/Modules/Manager.php
library/Icinga/Application/Web.php
library/Icinga/Authentication/Backend/DbUserBackend.php
library/Icinga/Authentication/Manager.php
library/Icinga/User/Preferences/IniStore.php
test/php/library/Icinga/Application/LoggerTest.php
07d04628cf