i need init and destroy

[Frank Cusack]

Looks like the init and destroy methods went away 5 days ago.  My module
(rlm_otp) needs them.

- How was this tested?  struct module_t rlm_otp still contains these
  methods.  How can this even compile?
- What are the chances of getting these back?  I can do something
  like pthread_once(otp_init()) and add a refcount to cleanup in detach,
  but really, init and destroy are superior.

-frank