Issue #2314599 by Crell, Cottser, dawehner: Use title/url instead of l() for building breadcrumb.

core/includes/theme.inc

...lib/Drupal/Core/Breadcrumb/BreadcrumbBuilderInterface.php

core/lib/Drupal/Core/Link.php

core/lib/Drupal/Core/Utility/LinkGenerator.php

core/lib/Drupal/Core/Utility/LinkGeneratorInterface.php

core/modules/book/src/BookBreadcrumbBuilder.php

core/modules/comment/src/CommentBreadcrumbBuilder.php

...dules/forum/src/Breadcrumb/ForumBreadcrumbBuilderBase.php

...es/forum/src/Breadcrumb/ForumListingBreadcrumbBuilder.php

...dules/forum/src/Breadcrumb/ForumNodeBreadcrumbBuilder.php

core/modules/forum/src/Tests/ForumTest.php

...m/tests/src/Breadcrumb/ForumBreadcrumbBuilderBaseTest.php

...ests/src/Breadcrumb/ForumListingBreadcrumbBuilderTest.php

...m/tests/src/Breadcrumb/ForumNodeBreadcrumbBuilderTest.php

core/modules/menu_ui/menu_ui.module

core/modules/system/src/PathBasedBreadcrumbBuilder.php

...modules/system/src/Plugin/Block/SystemBreadcrumbBlock.php

core/modules/system/templates/breadcrumb.html.twig

.../tests/src/Breadcrumbs/PathBasedBreadcrumbBuilderTest.php

core/modules/taxonomy/src/TermBreadcrumbBuilder.php