Ensure syntax errors and other configuration problems are surfaced to the user.

Summary:
Some PHP has junky defaults for error_reporting / display_errors, and the "@"
silences fatals. The @ should never have been there, I just copied it from the
libphutil initializer where we use @ because the default error message can be
confusing and we display a more useful one.

Test Plan:
Added fatals to my conf file, got a decent error message instead of silent exit
with err=255.

Reviewed By: aran
Reviewers: tuomaspelkonen, aran, jungejason
CC: aran
Differential Revision: 355

Author: epriestley

conf/__init_conf__.php

@@ -18,7 +18,7 @@
 
 function phabricator_read_config_file($config) {
   $root = dirname(dirname(__FILE__));
-  $conf = @include $root.'/conf/'.$config.'.conf.php';
+  $conf = include $root.'/conf/'.$config.'.conf.php';
   if ($conf === false) {
     throw new Exception("Failed to read config file '{$config}'.");
   }

scripts/__init_script__.php

@@ -16,6 +16,9 @@
  * limitations under the License.
  */
 
+error_reporting(E_ALL | E_STRICT);
+ini_set('display_errors', 1);
+
 $include_path = ini_get('include_path');
 ini_set('include_path', $include_path.':'.dirname(__FILE__).'/../../');
 @include_once 'libphutil/src/__phutil_library_init__.php';