Allow proxying to a resource at /

Add a route for /proxy/<kind>/<name>/ without requiring additional path
information. This allows for e.g. /proxy/service/myservice/, which will
proxy to the service at /, instead of always requiring something in the
path.

pkg/apiserver/proxy_test.go

@@ -244,6 +244,7 @@ func TestProxy(t *testing.T) {
 		{"DELETE", "/some/dir/id", "", "ok", "text/css", "default"},
 		{"GET", "/some/dir/id", "", "answer", "text/css", "other"},
 		{"GET", "/trailing/slash/", "", "answer", "text/css", "default"},
+		{"GET", "/", "", "answer", "text/css", "default"},
 	}
 
 	for _, item := range table {