Path with ending / thinks it is empty binding

If we have a routing file like:

```erlang
#{prefix => "",
   security => false,
   routes => [{"/mypath", {module, function}, #{methods => [get]}},
                     {"/mypath/:mypathid", {module, function2}, #{methods => [get]}}]}
```

Then we do a request to `/mypath/` lookup will think we are getting the second one with binding when we should really get the segment with no binding.