[Shootout-list] Ruby TCP submissions

[Hunter Kelly]

Here are some entries for the tcp-* programs, implemented in ruby.

The wording of the problem was slightly vague:  It doesn't say
what the request size is, nor what should be in it.

I noticed that even though the program is called tcp-echo, none
of the provided programs actually write back the content that was
is sent - they just sends back a fixed response to a 64 byte packet.

I had originally written the programs to send back the data that was 
sent, but seeing as how the other programs aren't doing that, I decided
not to, either.

If this is an error, please let me know.

Also, the tcp-echo program is very slightly different from the other two
because of how ruby's read method reads into an existing buffer.  I have 
non-buffering versions, which are slightly slower (becuase of memory 
allocation I suspect), but, in my opinion, much more "Ruby-like" and cleaner.
I'd be willing to post those if people think it's appropriate.

Thanks,

Hunter Kelly
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