GitLab

Run LegacyUrlMatcher through ChainMatcher. That necessitates making ChainMatcher temporarily context-aware.

Fix documentation to clarify that a FinalMatcher returns attributes, not a Route or RouteCollection.

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.

A Nested router is a series of partial routers, each of which whittle down a RouteCollection
until it is left with a single matching route.  That single route is the final route that
matches the request.