[PATCH] Exceptions from FastCGI

[brmichel]

Some exceptions raised by FastCGI on signals are not handled correctly:

• if a connection is closed while camping is serving it, FastCGI raises an exception on broken pipe; camping rescues this exception and tries to send a page with a 500 error, thus another broken pipe,
• camping do not exits if it receives a SIGTERM while serving a request.

My patch fixes those problem, but I'm not sure if FastCGI uses other signals for its own usage.

[zimbatm]

This has to be discussed. I think that rescuing the StandardError? in camping should be enough. So the code can be written as such :

rescue => ex
  # ...
end

As described here : http://www.zenspider.com/Languages/Ruby/QuickRef.html#34, Interrupt and parsing errors will not be catched.

I think that ScriptError? should be handled by the Camping::Reloader and the rest by the adapter.

[why]

Good suggestions both from brmichel and zimbatm. I have combined in [191].