Issue #3054392 by iuana, joachim: protected methods in LocalAwareRedirectResponseTrait are missing docs

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2507831 by dawehner, tim.plunkett, effulgentsia: Harden redirect responses to make external URIs opt in (was SA-CORE-2015-002 foward-port)