PERFORCE change 119527 for review

[Roman Divacky]

On Tue, May 08, 2007 at 10:29:53PM +0000, Fredrik Lindberg wrote:
> http://perforce.freebsd.org/chv.cgi?CH=119527
> 
> Change 119527 by fli at fli_genesis on 2007/05/08 22:29:14
> 
> 	Add data structures needed by the stack.
> 	A Double-linked list and a hash table.

what about sys/queue.h ? it provides various abstract data types
including double-linked list