Correct documentation error

SSL_get_async_wait_fd() was replaced by SSL_get_all_async_fds() and
SSL_get_changed_async_fds().
Reviewed-by: NRichard Levitte <levitte@openssl.org>

doc/ssl/SSL_get_error.pod

@@ -95,9 +95,9 @@ using L<SSL_CTX_set_mode(3)> or L<SSL_set_mode(3)> and an asynchronous capable
 engine is being used. An application can determine whether the engine has
 completed its processing using select() or poll() on the asynchronous wait file
 descriptor. This file descriptor is available by calling
-L<SSL_get_async_wait_fd(3)>. The TLS/SSL I/O function should be called again
-later. The function B<must> be called from the same thread that the original
-call was made from.
+L<SSL_get_all_async_fds(3)> or L<SSL_get_changed_async_fds(3)>. The TLS/SSL I/O
+function should be called again later. The function B<must> be called from the
+same thread that the original call was made from.
 
 =item SSL_ERROR_WANT_ASYNC_JOB