Bump automatic replay protection to Nov 2020 upgrade

Summary:
This returns main chain to ForkID of 0 after the May 2020
upgrade, and implements automatic replay protection for
the Nov 2020 upgrade.

The next upgrade time is precisely 184.0 days after the
phonon activation time, and is:

Sunday, November 15, 2020 12:00:00 PM   UTC

For reference see last HF: D3868

Depends on D5289

Test Plan: ninja check-all ; check timestamp carefully

Reviewers: #bitcoin_abc, deadalnix, Mengerian, markblundeberg

Reviewed By: #bitcoin_abc, deadalnix, Mengerian

Subscribers: Mengerian, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D5253