R1:e99048888927

Set some defaults back to correctness.

Summary:
There were a few defaults that got changed when porting to PHP. Most of them
seem to be accidental, so this diff sets them back to correctness.

Test Plan:
php> require '../libphutil/src/__phutil_library_init__.php';
php> require 'src/__phutil_library_init__.php'
php> $a = PhabricatorApplicationConfigOptions::loadAllOptions()
php> $b = require 'conf/default.conf.php';
php> $x = array();
php> foreach($a as $key => $obj) { $x[$key] = $obj…