Very basic daemon infrastructure, plus MetaMTA daemon.

Summary: Amazon SES seems to be working well, except that it takes more than a
second to send mail in-process. Kick it out of process. (Between this and the
ImplementationAdapter layer, MetaMTA almost makes sense. :/)

Test Plan: Ran the daemon and got a flood of unsent test email.

Reviewers:

CC:

scripts/__init_script__.php

@@ -30,3 +30,12 @@ if (!ini_get('date.timezone')) {
 }
 
 phutil_load_library(dirname(__FILE__).'/../src/');
+
+function phabricator_read_config_file($config) {
+  $root = dirname(dirname(__FILE__));
+  $conf = include $root.'/conf/'.$config.'.conf.php';
+  if ($conf === false) {
+    throw new Exception("Failed to read config file '{$config}'.");
+  }
+  return $conf;
+}

scripts/daemon/run_daemon.php

@@ -1,3 +1,4 @@
+#!/usr/bin/env php
 <?php
 
 /*
@@ -16,4 +17,22 @@
  * limitations under the License.
  */
 
-// Placeholder so I don't forget about this, hopefully.
+$root = dirname(dirname(dirname(__FILE__)));
+require_once $root.'/scripts/__init_script__.php';
+
+$env = getenv('PHABRICATOR_ENV');
+if (!$env) {
+  echo "Define PHABRICATOR_ENV before running scripts.\n";
+  exit(1);
+}
+
+$conf = phabricator_read_config_file($env);
+$conf['phabricator.env'] = $env;
+
+phutil_require_module('phabricator', 'infrastructure/env');
+PhabricatorEnv::setEnvConfig($conf);
+phutil_require_module('phutil', 'symbols');
+
+PhutilSymbolLoader::loadClass('PhabricatorMetaMTADaemon');
+$daemon = new PhabricatorMetaMTADaemon();
+$daemon->run();