[gopher] Correct error handling

[Cameron Kaiser]

> Yes, your solution is good.
> Maybe we can check that every server and proxy handle error like this.

You can certainly have a heuristic to intelligently handle how most servers
and proxies emit errors, but you should have a graceful failure case.

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  Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com
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