Issue #1915752 by dawehner, tim.plunkett: routes are not found when 0 is used as a placeholder value.

Issue #1845402 by Crell, amateescu, dawehner, klausi, g.oechsler: Change notice: Update menu link access checks for new router.

Issue #1906358 by dawehner: Fixed RouteProvider::getRouteByName() / RouteProvider::getRouteByNames() aren't working due to multiple reasons.

Larry Garfield authored Sep 12, 2012 and Alex Bronstein committed Oct 01, 2012

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.

Larry Garfield authored Sep 12, 2012 and Alex Bronstein committed Oct 01, 2012

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

Larry Garfield authored Jun 23, 2012 and Alex Bronstein committed Oct 01, 2012

The PathMatcher matches against the database table structure generated by the
MatcherDumper.  As of this commit the lookup is not yet implemented. It's still
in testing.