Revert "Make sure Merb.root has / at the end. This should make Passenger happy."
Revert "Make sure Merb.root has / at the end. This should make Passenger happy."

This reverts commit 359771d8b11032e25d5598db246249fa8d9ff4cb.

Trailing slash did cause harm, so we need to find another way of making Passenger
happy.

merb/merb-core,merb/merb-core