GitLab

Issue #1393392 by c960657, fubhy: Convert prefix cache clears to cache tags, then remove support for them.

Issue #1797200 by pillarsdotnet, boombatower, solotandem, ZenDoodles, sun, xjm, yched, Damien Tournoud: (crediting those who worked on previous versions of this patch as well) Remove t() from test assertions in node module

Issue #1539940 by jwilson3, infiniteluke, mrf, ryanissamson: Fix up README files to encourage good placement of themes, modules, and profiles

Issue #1606794 by Crell, linclark, effulgentsia, katbailey, disasm, larowlan: Implement new routing system.

This is mostly temporary measures to work around bootstrap circular
dependencies until those are fixed.

In order to make default placeholders work, we had to modify the fit and path outline
routines to ignore them.  That also necessitated switching back to the original
outline/ancestors logic from Drupal 7, which with a very slight tweak to the masks
and '/'-prefix on paths still works just as it should.

Make use of the compiled regex when filtering routes by path, to account for default values and regex filters on placeholders.

Port the regex path matching from Symfony to our CompiledRoute class so that we can match placeholder-using paths.