feat: --allow-net supports CIDR ranges

[wuurrd]

Remove traffic to all local network with this PR using --deny-net=...

[CLAassistant]

All committers have signed the CLA.

[anonhostpi]

LGTM. I do not have write access to the repository though. You will need to request another reviewer.

[bartlomieju]

I think we should have an intergration test for this too, it should be added around here:

deno/tests/integration/run_tests.rs

Line 1442 in e8d9d59

fn net_fetch_localhost_subdomain() {

[bartlomieju]

LGTM, thanks, this is a great addition!

[dsherret]

LGTM