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IP addresses calculation

The IP addresses in IPv4 and IPv6 are complex to manage. In cause, the differents allowed formats.

The module allow to uncompress an IPv6 address (::1 is converted to 0000:0000:0000:0000:0000:0000:0000:0001), reverse an IP address (to use in DNS server in Reverse zones), calculate a CIDR associated to a IPv4 netmask