Add support for PHP array config files

- Add new base config files
- Remove useless DIRECTORY_SEPARATOR instances

config/local-sample.config.php

@@ -0,0 +1,44 @@
+<?php
+
+// Local configuration
+
+/* If automatic system installation fails:
+ *
+ * Copy this file to local.config.php
+ *
+ * Why local.config.php? Because it contains sensitive information which could
+ * give somebody complete control of your database. Apache's default
+ * configuration will interpret any .php file as a script and won't show the values
+ *
+ * Then set the following for your MySQL installation
+ *
+ * If you're unsure about what any of the config keys below do, please check the config/defaults.config.php file for
+ * detailed documentation of their data type and behavior.
+ */
+
+return [
+	'database' => [
+		'hostname' => 'localhost',
+		'username' => 'mysqlusername',
+		'password' => 'mysqlpassword',
+		'database' => 'mysqldatabasename',
+		'charset' => 'utf8mb4',
+	],
+
+	// ****************************************************************
+	// The configuration below will be overruled by the admin panel.
+	// Changes made below will only have an effect if the database does
+	// not contain any configuration for the friendica system.
+	// ****************************************************************
+
+	'config' => [
+		'admin_email' => '',
+		'sitename' => 'Friendica Social Network',
+		'register_policy' => 'REGISTER_OPEN',
+		'register_text' => '',
+	],
+	'system' => [
+		'default_timezone' => 'UTC',
+		'language' => 'en',
+	],
+];