Allow "send me an email" in personal rules to punch through settings
Summary:
Fixes T7731. When a user writes a "Send me an email" rule, always try send them an email, even if their notification settings would normally downgrade it to a notification.
In particular, this is stronger than these downgrades:
- Downgrades due to "self actions";
- downgrades due to "mail tags".
Test Plan:
- Wrote various Herald rules with "Send me an email" rules.
- Used bin/mail list-outbound / show-outbound to vet generated mail.
- Mail reacted properly to a variety of conditions (disabled accounts, settings, "send me an email" rule, forced delivery).
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T7731
Differential Revision: https://secure.phabricator.com/D12300