wip/cl-flexi-streams streams NetBSD

FLEXI-STREAMS implements "virtual" bivalent streams that can be layered atop real binary or bivalent streams and that can be used to read and write character data in various single- or multi-octet encodings which can be changed on the fly. It also supplies in-memory binary streams which are similar to string streams.

The library needs a Common Lisp implementation that supports Gray streams and relies on David Lichteblau's trivial-gray-streams to offer portability between different Lisps.

The code comes with a BSD-style license so you can basically do with it whatever you want.