add-client-syscall

Step in adding a syscall to the client:

1) write a state machine
		src/clent/sysint/...
		state machines should include the PVFS syscall and
		and internal PVFS isyscall
		Most SMs will utilize a message pair - a request to the server
			and a response from the server.  A reusable SM can process
			multiple concurrent message pairs: pvfs2_msgpairarray_sm
			thus mostly the SM must set up the message pairs and 
			process the results.
				There is both a msgpair and a msgarray field in the SM struct
		State functions return 0 or 1 on error-free completion,
		   0 indicates an asynchronous call has been made and must be waited for
			1 indicates no async call was made and should proceed to next state
		  <0 indicates an error - use PVFS_EXXX codes defined in
		       include/pvfs2-types.h

2) add items to
		include/pvfs2-sysint.h
		add function prototypes for syscall and isyscall
		add definition of system response struct (if needed)

3) add items to
		src/client/sysint/client-state-machine.h
		add struct for syscall specific fields
		add entry to union near bottom of file : struct PINT_client_sm
		add enumeration item near bottom of file
		add declarate of state machine function at bottom of file

4) add entries to identify the state machine
		src/client/sysint/client-state-machine.c
		PINT_client_state_machine_post()
		PINT_client_get_name_str()