Custom URI paths

[michaelhui8]

There is another feature request related to this, and I would like to add that in addition to custom hostnames, custom URI paths be available.

Since some architectures require that APPGW be in front of the API Management, the URI paths can somewhat be re-written. For example you may want to have a multisite APPGW, and a single APIM service, people may wish to re-write a URI to /site1/apipath or /site2/apipath.