Document which components perform network calls

[sureshjoshi]

For those of us who use lulu or similar, any new application which calls out to the network needs to be approved.

In existing Pants, it's the system/pyenv Python, while now it's ptex and standalone Python.

I can tackle this one when I next wipe my rules, so I can give examples.

[sureshjoshi]

Appears to only be two items:

• ptex on port 443 located at {CACHE_DIR}/nce/{digest}/ptex
• python3.9 on port 443 located at {CACHE_DIR}/nce/{digest}...-install_only.tar.gz/python/bin/python3.9

Afterwards, it's regular Pants stuff

[jsirois]

Yeah, that squares. It's ptex to fetch a PBS distribution, then some pip installs using that distribution.