ERR_load_crypto_strings() registers the error strings for all
libcrypto functions. SSL_load_error_strings() does the same,
but also registers the libssl error strings.
One of these functions should be called before generating
textual error messages. However, this is not required when memory
usage is an issue.
ERR_free_strings() frees all previously loaded error strings.
RETURN VALUES
ERR_load_crypto_strings(), SSL_load_error_strings() and
ERR_free_strings() return no values.
