Scrupulous Syntax Highlighting for /etc/hosts

• It highlights IPv4 and IPv6 addresses rigidly. For example: it won't match the impossible movie IP-address 189.23.290.13. This makes it easier to spot errors.
• It uses different scopes (i.e. different colors) for some special IP ranges:
  • Loopback: ::1 and 127.0.0/8
  • Private: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, and fc00::/7
• Hostnames are in the local index: Ctrl+R (MacOS: Cmd+R)
• Hoverable tooltips on Punycode hostname segments to render internationalized domain names.
• Command Palette item to open Hosts file.

Install via Package Control.

The regular expressions for IPv6 by David M. Syzdek were found on stackoverflow.com. I had to rewrite them in a different format, so any faults or mistakes are probably mine.

Michael Lyons provided fixes and some great additions. And after that he rewrote the whole thing to add support for IPv6 (though still based on David M. Szydek).