Adding url_suffix fix for uri to url create method

`strlen($suffix) > 4` for two letter **.tld**, since one symbol plus slash plus point plus two letter tld is **5** (e.g. '**.ru/2**').
I discovered original issue when trying to get Route for one-symbol uri, url_suffix was added only for two symbol.

Imho, It would be better to change checking «whether uri has suffix» logic as:
```php
if (substr($url, -1) != '/' and (($suffix = \Config::get('url_suffix')) == false or !strrpos($uri,$suffix)))
```