UrlModule binds servlets for all REST root collections except for
'/plugins/'. Due to this plugins cannot add REST views on PLUGIN_KIND.
However this is intentional. '/plugins/' is already handled by
HttpPluginServlet which is bound in HttpPluginModule. Binding 2
different servlets on the same regex would result in undefined
behavior. If a plugin is serving anything under its '/plugins/<id>/'
namespace like a static file for JavaScript or a custom servlet or
protocol it may no longer work if UrlModule's binding is being used.
Add a comment to UrlModule so we are not tempted to add a binding for
a servlet that handles '/plugins/' here, as this would break the
plugins as described above.
Change-Id: I50a7883d5674c54d7637fd1ee2767b171c773e58
Signed-off-by: Edwin Kempin <ekempin@google.com>
834458e26c