MFC 7.0 calcru changes

[Mike Jakubik]

David O'Brien wrote:
> This is a patch to MFC what I think are all the calcru-related changes
> that occurred since 6-STABLE was branched and 7.0 continued forward.
>
> If anyone spots some changes I missed, please yell out.
>
>   

Thank you so much! My supermicro systems are plagued by calcru messages 
and timing problems, last time i checked there was no plan to fix this 
on 6, CURRENT worked fine so this should fix it.