Equivalent transformation:
	* ps_continuation renamed - it's "phase" now.
	* run_fsm() does what ps_tq_int() used to do
	* calls of pi_do_claimed(..., func) replaced with
	  phase = func; pi_do_claimed(..., run_fsm);
	Now all phase functions are called from run_fsm() and we
	can start pulling the common code into it.