Re: LuaSocket 3.0-rc1 now available

[Fabien <fleutot+lua@...>]

I didn't know you were working on a major release. I have a couple of suggestions about ltn12, which I would have liked you to consider:

• filter.chain(...) will accept any number of filters and chain them together; source.chain(src, f) will also "accept" any number of filters, however it will silently ignore all of them but the first one. Something like "function source.chain(src, f, ...) if ... then f=filter.chain(f, ...) end" would avoid this hard-to-find bug.
• Same for sink.chain(s, snk).
• Allowing to pass filters in pump calls, i.e. "pump.all(src, f1, f2, ..., fn, snk)"  would often improve user code readability.
• Speaking of this, I can't figure out the intended use case for the optional "step" argument in pump.all(src, snk, step).