Robert Watson fa8003c6b9 Remove custom queue macros in Coda, replacing them with queue(9) tailq
macros.  The only semantic change was the need to add a vc_opened field
to struct vcomm since we can no longer use the request queue returning
to an uninitialized state to hold whether or not the device is open.

MFC after:	1 month
2008-02-17 14:33:28 +00:00
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