Entity-Id handling is in-correct in "server-core-ext" module

Typically the entity-id queries are like

http://host/service/$entity?                    $id=http://host/service/Customers('ALFKI')&$select=CompanyName,ContactName&$expand=Orders

The server-ext-framework treats the value of $id as URI, but there is "&" instead of "?" after Customers('ALFKI')