Evaluate using roflcoptor as Tor control port filter

https://github.com/subgraph/roflcoptor

It seems to be used by Subgraph and the successor of or-ctl-sieve, which I mentioned in #6742-note_14.

If it matches our requirements and is likely to be maintained, maybe we should replace our custom control port filter with this.

Related issues

• Related to #9001 (closed)
• Related to #7870 (closed)
• Related to #6788 (closed)
• Related to #6384 (closed)
• Related to #11826 (closed)
• Blocks #6742 (closed)

Original created by @sajolida on 11542 (Redmine)