Chunk server: minor comment and formatting fixes.
Qcdio library: set ref. count to a negative value in ref. counted object destructor to catch possible double delete and simplify debugging.
Client library: Kfs protocol state machine: set ref. count to a negative value in ref. counted object destructor to catch possible double delete and simplify debugging. Declare GetAuthContext() method const, and remove ref. count increment/decrement in this method to make the interface more consistent. Implement stricter ref. count check ins StRef constructor.