[Differential] D24511: Introduce gauges as new types

[Scheffenegger, Richard]

Hi Rodney,

As you suggested, I created a new "sys/gauges.h" header file, to jumpstart the discussion of universal utility for that 


> tcp_var.h:540
> +         ((x) < UTYPE_MAX(x)) ? (x)++ : (x)
> +
>  /*

Ah, now this explains why I could not find CEILINC on my 12.1 machine... This set of macros and usage should probably be discussed on the -arch mailling list.  This is a general mechanism and should probably be considered on a grander scale and by a wider audiance than just netinet stuff

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To: rscheff, rrs, #transport, tuexen, rgrimes
Cc: melifaro, tuexen, rscheff