fix(netmask): prefix length integer overflow#32
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The netmask UnmarshalText function parsed the IPv6 prefix length into a uint64 then converted to an int, which can be a smaller size (eg, on 32-bit platforms). As the prefix length can't exceed 128, instead parse as a uint8.
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The netmask UnmarshalText function parsed the IPv6 prefix length into a uint64 then converted to an int, which can be a smaller size (eg, on 32-bit platforms). As the prefix length can't exceed 128, instead parse as a uint8.