New feature: restrict address/cidr

[Hal Murray]

Nice.  Thanks.

> restrict 10.169.0.0 mask 255.0.0.0
> restrict 10.169.0.0/8

Slightly strange example.  I'd expect 10.0.0.0 mask 255.0.0.0 == 10.0.0.0/8
or 10.169.0.0 mask 255.255.0.0 == 10.169.0.0/16

Should that generate an error message?


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