Show host information on setup issue screen

Summary: Ref T3780. Facebook has some environmental / itermittent stuff which would be easier to debug with host information on the setup issue screen.

Test Plan:
Checked both in-chrome and out-of-chrome versions of this screen, both looked reasonable.

{F56694}

Reviewers: wez, btrahan

Reviewed By: btrahan

CC: chad, aran

Maniphest Tasks: T3780

Differential Revision: https://secure.phabricator.com/D6842
Fix default order for Differential queries

Summary:
Fixes T3781. The UI defaults to "Created" but the query defaults to "Modified". Make the two consistent.

In particular, an issue this fixes is that previously a `/differential/?authors=duck` page would show "Order: Created" but actually order by "Modified".

Test Plan: Visited `/differential/?authors=duck` and verified the revisions were ordered by creation date.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3781

Differential Revision: https://secure.phabricator.com/D6843
Remove "Chaos" mode and fix fullscreen in Conpherence

Summary:
Fixes T3782. Two changes:

  - Remove the "Chaos" mode, which wasn't as funny as I'd hoped and has had a good run.
  - Fix "Order" (now "Fullscreen") mode in Conpherence. Best fix I could come up with is dropping the "position: fixed" on all parents while in the mode.

Test Plan: Used Fullscreen mode in Conpherence in Chrome.

Reviewers: chad

Reviewed By: chad

CC: aran

Maniphest Tasks: T3782

Differential Revision: https://secure.phabricator.com/D6844
Fix one more rule with remarkup fullscreen mode

Fixes T3782. After D6844, the menu bar would still float on top of this.

Auditors: chad
Implement "Add to CC" rule for Audits

Summary:
D6660 accidentally allowed you to build Herald rules for commits that take action "Add to CC", but provided no implementation.

Someone at Facebook then wrote such a rule.

Fix forward since there's no real reason not to allow this.

Test Plan: Used `./scripts/repository/reparse.php --herald rXnnnn` to trigger rules. Observed rule trigger and subsequent subscription.

Reviewers: wez, btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D6845
Fix outdated link to MetaMTA web UI in MetaMTA tasks

Summary: Missed this when moving most MetaMTA responsibilities to the CLI. Show the correct command to get data rather than linking to a 404.

Test Plan: {F56733}

Reviewers: wez, btrahan, chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D6846