Issue #2428563 by Wim Leers: Introduce parameter-dependent cache contexts

core/core.services.yml

core/lib/Drupal/Core/Block/BlockBase.php

core/lib/Drupal/Core/Cache/CacheContexts.php

core/lib/Drupal/Core/Cache/CacheableInterface.php

...lib/Drupal/Core/Cache/CalculatedCacheContextInterface.php

core/lib/Drupal/Core/Cache/MenuActiveTrailCacheContext.php

core/lib/Drupal/Core/Menu/MenuActiveTrail.php

core/lib/Drupal/Core/Menu/MenuActiveTrailInterface.php

core/modules/system/src/Plugin/Block/SystemMenuBlock.php

core/tests/Drupal/Tests/Core/Cache/CacheContextsTest.php

core/tests/Drupal/Tests/Core/Menu/MenuActiveTrailTest.php