Setup: don't require date.timezone

refs #3626

doc/02-Installation.md

@@ -16,7 +16,6 @@ chapter.
 * A web server, e.g. Apache or Nginx
 * PHP version >= 5.6.0
 * The following PHP modules must be installed: cURL, gettext, intl, mbstring, OpenSSL and xml
-* Default time zone configured for PHP in the php.ini file
 * LDAP PHP library when using Active Directory or LDAP for authentication
 * MySQL or PostgreSQL PHP libraries
 
@@ -318,8 +317,6 @@ Check these directories:
 * `/etc/php.ini`
 * `/etc/php.d/*.ini`
 
-Most important for icingaweb2 is `date.timezone`.
-
 PHP settings should be stored to:
 
 * RedHat / CentOS 7: `/etc/opt/rh/rh-php71/php.d/`

doc/20-Advanced-Topics.md

@@ -477,10 +477,9 @@ and all the other steps described above first.
 
 1. Install PHP dependencies: `php`, `php-intl`, `php-imagick`, `php-gd`, `php-mysql`, `php-curl`, `php-mbstring` used
 by Icinga Web 2.
-2. Set a timezone in `php.ini` configuration file.
-3. Create a database for Icinga Web 2, i.e. `icingaweb2`.
-4. Import the database schema: `mysql -D icingaweb2 < /usr/share/icingaweb2/etc/schema/mysql.schema.sql`.
-5. Insert administrator user in the `icingaweb2` database:
+2. Create a database for Icinga Web 2, i.e. `icingaweb2`.
+3. Import the database schema: `mysql -D icingaweb2 < /usr/share/icingaweb2/etc/schema/mysql.schema.sql`.
+4. Insert administrator user in the `icingaweb2` database:
 `INSERT INTO icingaweb_user (name, active, password_hash) VALUES ('admin', 1, '<hash>')`, where `<hash>` is the output
 of `openssl passwd -1 <password>`.
 5. Make sure the `ido-mysql` and `api` features are enabled in Icinga 2: `icinga2 feature enable ido-mysql` and 

modules/setup/library/Setup/WebWizard.php

@@ -575,15 +575,6 @@ class WebWizard extends Wizard implements SetupWizard
             )
         )));
 
-        $set->add(new PhpConfigRequirement(array(
-            'condition'     => array('date.timezone', true),
-            'title'         => mt('setup', 'Default Timezone'),
-            'description'   => sprintf(
-                mt('setup', 'It is required that a default timezone has been set using date.timezone in %s.'),
-                php_ini_loaded_file() ?: 'php.ini'
-            ),
-        )));
-
         $set->add(new OSRequirement(array(
             'optional'      => true,
             'condition'     => 'linux',