* Add CVE List to Vulnerability Databases section, since it was missing.
* Style guide compliance pass focused on Vulnerability Databases section.
* Whitelist the Inj3ct0r URLs.
The `0day.today` website sits behind an extremely aggressive Cloudflare
anti-bot checker, which causes `awesome-bot` to trigger an HTTP 503
response. This fails the build but is actually normal behavior.
Similarly, the Onion service is inaccessible except over Tor and our
Travis CI configuration does not (yet?) support checking Onion service
links. (Although, perhaps it should be updated to do so in a future PR.)
