Allow to set cookie_samesite to 'none'

Author: ihmels

DependencyInjection/Configuration.php

@@ -542,7 +542,7 @@ private function addSessionSection(ArrayNodeDefinition $rootNode)
                         ->scalarNode('cookie_domain')->end()
                         ->enumNode('cookie_secure')->values([true, false, 'auto'])->end()
                         ->booleanNode('cookie_httponly')->defaultTrue()->end()
-                        ->enumNode('cookie_samesite')->values([null, Cookie::SAMESITE_LAX, Cookie::SAMESITE_STRICT])->defaultNull()->end()
+                        ->enumNode('cookie_samesite')->values([null, Cookie::SAMESITE_LAX, Cookie::SAMESITE_STRICT, Cookie::SAMESITE_NONE])->defaultNull()->end()
                         ->booleanNode('use_cookies')->end()
                         ->scalarNode('gc_divisor')->end()
                         ->scalarNode('gc_probability')->defaultValue(1)->end()