[Nitro] nitro scgi support improvement

[George Moschovitis]

> No doubt everyone on the list knows this, but for some newcomer to how
> servers and browsers interact in a session based web app (me for example a
> few months ago), it was an odd thing. Maybe this will spare some other
> newcomer. Or perhaps the FCGI, SCGI and potentially ACGI adapters should
> default to File based session info? I'll see about a patch if anyone thinks
> it's an okay idea.

this is a nice point. Please send me the patch. I will also try to add
some warning messages and/or try to start the drb server from the
Runner.

-g.

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