This is a follow-up PR for #17855

There is around 500+ targets which are gone from DNS, however I am not going to handle the fetch errors in the PR.

Besides, it surprises me that the node URL object accepts hostname with leading dots. This make the script from #18068 a little buggy. Since it is not possible to whitelist rulesets from schematic errors, Travis failed. The problematic rulesets are fixed in eef2855

$ node
> new URL('https://.example.com/')
URL {
  href: 'https://.example.com/',
  origin: 'https://.example.com',
  protocol: 'https:',
  username: '',
  password: '',
  host: '.example.com',
  hostname: '.example.com',
  port: '',
  pathname: '/',
  search: '',
  searchParams: URLSearchParams {},
  hash: '' }

$ node --expose-gc utils/memusage.js

[Before]
Initial usage: 42 MB
Maximum usage: 77.8 MB

[After]
Initial usage: 42.3 MB
Maximum usage: 77.6 MB