Function isBlockedHostname

isBlockedHostname(host: string): boolean
Tells whether a hostname names the local machine or a local network by convention.
Parameters
- host: string
  A hostname, in any case, with or without a trailing dot.
Returns boolean
True for localhost and names under .localhost, .local or .internal.
Example
```
isBlockedHostname('printer.local'); // true
isBlockedHostname('example.com'); // false
```