Modularize Aphront "sites"

Summary:
Fixes T5702. The path here is long and windy:

  - I want to move `blog.phacility.com` to the new `secure` host.
  - That host has `security.require-https` set, which I want to keep set (before, this was handled in a sort of hacky way at the nginx/preamble level, but I've cleaned up everything else now).
  - Currently, that setting forces blogs to HTTPS too, which won't work.
  - To let blogs be individually configurable, we need to either modularize site config or make things hackier.
  - Modularize rather than increasing hackiness.
  - Also add a little "modules" panel in Config. See T6859. This feels like a reasonable middle ground between putting this stuff in Applications and burying it in `bin/somewhere`.

Test Plan:
  - Visited normal site.
  - Visited phame on-domain site.
  - Visited phame off-domain site.
  - Viewed static resources.

{F561897}

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T5702

Differential Revision: https://secure.phabricator.com/D13474

src/applications/config/controller/PhabricatorConfigSiteModuleController.php

@@ -0,0 +1,56 @@
+<?php
+
+final class PhabricatorConfigSiteModuleController
+  extends PhabricatorConfigController {
+
+  public function handleRequest(AphrontRequest $request) {
+    $viewer = $this->getViewer();
+
+    $sites = AphrontSite::getAllSites();
+
+    $rows = array();
+    foreach ($sites as $key => $site) {
+      $rows[] = array(
+        $site->getPriority(),
+        $key,
+        $site->getDescription(),
+      );
+    }
+
+    $table = id(new AphrontTableView($rows))
+      ->setHeaders(
+        array(
+          pht('Priority'),
+          pht('Class'),
+          pht('Description'),
+        ))
+      ->setColumnClasses(
+        array(
+          null,
+          'pri',
+          'wide',
+        ));
+
+    $box = id(new PHUIObjectBoxView())
+      ->setHeaderText(pht('Site Modules'))
+      ->appendChild($table);
+
+    $crumbs = $this->buildApplicationCrumbs();
+    $crumbs->addTextCrumb(pht('Site Modules'));
+
+    $nav = $this->buildSideNavView();
+    $nav->selectFilter('module/sites/');
+    $nav->appendChild(
+      array(
+        $crumbs,
+        $box,
+      ));
+
+    return $this->buildApplicationPage(
+      $nav,
+      array(
+        'title' => array(pht('Site Modules')),
+      ));
+  }
+
+}