Totally get rid of CRYPTO_LOCK_ERR_HASH.

Totally get rid of CRYPTO_LOCK_ERR_HASH.

In err.c, flags int_error_hash_set and int_thread_hash_set
appear superfluous since we can just as well initialize
int_error_hash and int_thread_hash to NULL.

Change some of the err.c formatting to conform with the rest of
OpenSSL.