net: remove TODO for moving isIP to dns
net: remove TODO for moving isIP to dns

It is not really DNS-specific so keeping it in net makes more sense.

PR-URL: https://github.com/iojs/io.js/pull/286
Reviewed-By: Ben Noordhuis <59bd0a3ff43b32849b319e645d4798d8a5d1e889@bnoordhuis.nl>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node