Issue #2600666 by tim.plunkett: Route definitions using entity type paramconverters with serial IDs should add an integer requirement

Issue #2051097 by dawehner, Manuel Garcia, tlattimore, neclimdul: Change 'pattern' to 'path' in *.routing.yml files.

Issue #1981368 by tim.plunkett, Crell, webchick: Convert all routes to 'module_name().foo_bar()' naming convention.

Issue #1991684 by Wim Leers, rcaracaus, amateescu, msonnabaum: Fixed Node history markers (comment & node 'new' indicator, 'x new comments' links) forces render caching to be per user.