Properly register "custom" URL helpers as named helpers.

CustomUrlHelpers were introduced in ce7d5fb2e6, closing issue #22512.
They currently register themselves in an ivar that is never accessed.
This change removes the @custom_helpers special-case, and registers them
the way named routes are normally handled.

Without this, you can get route_defined?(:example_url) == false, while
still being able to call url_helpers.example_url and example_path.

Various popular gems such as 'rspec-rails' make use of route_defined?()
when determining how to proxy method calls or whether to define a route.

0 files changed, 0 insertions, 0 deletions