Resolve `localhost` to IP

[notroid5]

Currently, Deno does not resolve localhost and asks for net access to 127.0.0.1 (IPv4) or ::1 (IPv6). Even though this address will probably never change, I prefer using hostnames for consistency.

This could be solved by:

• reading and parsing the hosts file (plus more permission requests)
• hardcoding

Hardcoding would be fine for me unless someone knows a reason to read the hosts file.

[edilson258]

+1