Clarification.

  *) New function "CRYPTO_num_locks" that returns CRYPTO_NUM_LOCKS.

     Whoever hopes to achieve shared-library compatibility across versions

     must use this, not the compile-time macro.

     (Exercise 0.9.4: Which is the minimum library version required by

     such programs?)

     Note: All this applies only to multi-threaded programs, others don't

     need locks.

     [Bodo Moeller]

  *) Add missing case to s3_clnt.c state machine -- one of the new SSL tests