frontend: automatically create aliases for routes with trailing slash

Or the other way around, depends on what we happen to define at the
moment.

frontend/coprs_frontend/coprs/__init__.py

@@ -97,6 +97,10 @@ def setup_profiler(flask_app, enabled):
 })
 app.cache = cache
 
+# We don't want to manually define all the routes twice, once with a trailing
+# slash and one without it.
+app.url_map.strict_slashes = False
+
 app.request_class = get_request_class(app)
 
 from coprs.views import admin_ns