Add argument to spawn-fcgi to make it not fork.
I have modified spawn-fcgi to add a -n argument to spawn-fcgi so it can be run in a non-forked mode. This is useful (to me) primarily for running under daemontools. Patch is from the 1.3.x branch, but I don't belive this file has changed in 1.4.x. It is a minor change and does not cause any noticable problems in active operation.
Patch is at http://ga-forum.com/~graham/spawn-fcgi.patch
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