www/rustfs: New port: High-performance distributed S3-compatible object storage

[longros]

Summary

RustFS is a high-performance, distributed object storage system built in Rust, with broad S3 API compatibility.

The Console is released separately by upstream and embedded into the binary at build time.

WWW: https://rustfs.com/

Test Plan

www/rustfs/files/rustfs.in is based on www/minio/files/minio.in modified to the corresponding RustFS variables.

poudriere testport: 14.4-RELEASE, 14.5-RELEASE, 15.1-RELEASE and 16.0-CURRENT amd64 pass.

I also tested the rc script in a jail. The Console (web interface) listens on port 9001 and the S3 API on port 9000.