Improve CIDR validation for a given mask

[elee826]

For a given mask, if the IP address has bits set to the right, it should be invalid.

For example:
2.2.2.0/22 should be invalid because there are bits set to the right of the mask.

ip address bit pattern (2.2.2.0):
00000010 00000010 00000010 00000000

mask bit pattern (22):
11111111 11111111 11111100 00000000

[elee826]

This type of validation is overly strict and is only used to model a network’s IP address rather than a device’s IP address. The original thought was that the validation should match that of Postgres SQLs cidr type, but that is too implementation specific.