Merge branch 'master' into master

classes/config.php

@@ -484,7 +484,8 @@ class Config {
 			array_push($errors, "Data export cache is not writable (chmod -R 777 ".self::get(Config::CACHE_DIR)."/export)");
 		}
 
-		if (self::get(Config::SINGLE_USER_MODE) && class_exists("PDO")) {
+		// ttrss_users won't be there on initial startup (before migrations are done)
+		if (!Config::is_migration_needed() && self::get(Config::SINGLE_USER_MODE)) {
 			if (UserHelper::get_login_by_id(1) != "admin") {
 				array_push($errors, "SINGLE_USER_MODE is enabled but default admin account (ID: 1) is not found.");
 			}

classes/userhelper.php

@@ -75,7 +75,7 @@ class UserHelper {
 
 			$_SESSION["auth_module"] = false;
 
-			if (!$_SESSION["csrf_token"])
+			if (empty($_SESSION["csrf_token"]))
 				$_SESSION["csrf_token"] = bin2hex(get_random_bytes(16));
 
 			$_SESSION["ip_address"] = UserHelper::get_user_ip();

include/sessions.php

@@ -106,13 +106,11 @@
 	}
 
 	if (\Config::get_schema_version() >= 0) {
-		if (!\Config::get(\Config::SINGLE_USER_MODE)) {
 		session_set_save_handler('\Sessions\ttrss_open',
 			'\Sessions\ttrss_close', '\Sessions\ttrss_read',
 			'\Sessions\ttrss_write', '\Sessions\ttrss_destroy',
 			'\Sessions\ttrss_gc');
 		register_shutdown_function('session_write_close');
-		}
 
 		if (!defined('NO_SESSION_AUTOSTART')) {
 			if (isset($_COOKIE[session_name()])) {