-/* Sets up a SSL structure and performs the handshake on fd. The
- resulting SSL structure is registered with the file descriptor FD
- using fd_register_transport. That way subsequent calls to xread,
- xwrite, etc., will use the appropriate SSL functions.
+/* Perform the SSL handshake on file descriptor FD, which is assumed
+ to be connected to an SSL server. The SSL handle provided by
+ OpenSSL is registered with the file descriptor FD using
+ fd_register_transport, so that subsequent calls to fd_read,
+ fd_write, etc., will use the corresponding SSL functions.