url: disallow invalid IPv4 in IPv6 parser

Fixes: https://github.com/nodejs/node/issues/10655
PR-URL: https://github.com/nodejs/node/pull/12315


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>