IIS with Helicon Ape is not detected for suggesting pretty permalinks

[mikek70]

When deciding on suggesting pretty permalinks on the permalinks settings page, the function got_url_rewrite() is used, which checks the function iis7_supports_permalinks(). In this function, only the Microsoft URL Rewrite module is checked. A check for Helicons Ape (www.helicontech.com/ape/) should be included here as well since it supports full mod_rewrite functionality.