non-blocking reads on ulpt(4) - patched in NetBSD

[Greg Troxel]

If any of you are trying to use gutenprint with USB printers, it would
probably be useful to at least read this diff, and probably merge it
into FreeBSD.

When I started, I read diffs from FreeBSD's ulpt to NetBSD's, and
concluded that FreeBSD's was a lightly-modified (kernel infrastructure
issues) version of an older version of NetBSD's.  I think a remerge is
in order.  I'd be happy to answer questions if anyone works on this.

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From: Greg Troxel <gdt at netbsd.org>
Subject: CVS commit: src/sys/dev/usb
Date: Tue,  8 Jan 2008 00:58:10 +0000 (UTC)
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