do not output DB information, and do not set header

lib/private/db/adapter.php

@@ -71,7 +71,13 @@ class Adapter {
 			$entry = 'DB Error: "'.$e->getMessage() . '"<br />';
 			$entry .= 'Offending command was: ' . $query.'<br />';
 			\OC_Log::write('core', $entry, \OC_Log::FATAL);
-			throw new \OC\HintException($entry);
+			$l = \OC::$server->getL10N('lib');
+			throw new \OC\HintException(
+				$l->t('Database Error'),
+				$l->t('Please contact your system administrator.'),
+				0,
+				$e
+			);
 		}
 	}
 }

lib/private/db/adaptersqlite.php

@@ -41,7 +41,13 @@ class AdapterSqlite extends Adapter {
 			$entry = 'DB Error: "'.$e->getMessage() . '"<br />';
 			$entry .= 'Offending command was: ' . $query . '<br />';
 			\OC_Log::write('core', $entry, \OC_Log::FATAL);
-			throw new \OC\HintException($entry);
+			$l = \OC::$server->getL10N('lib');
+			throw new \OC\HintException(
+				$l->t('Database Error'),
+				$l->t('Please contact your system administrator.'),
+				0,
+				$e
+			);
 		}
 
 		if ($stmt->fetchColumn() === '0') {
@@ -59,7 +65,13 @@ class AdapterSqlite extends Adapter {
 			$entry = 'DB Error: "'.$e->getMessage() . '"<br />';
 			$entry .= 'Offending command was: ' . $query.'<br />';
 			\OC_Log::write('core', $entry, \OC_Log::FATAL);
-			throw new \OC\HintException($entry);
+			$l = \OC::$server->getL10N('lib');
+			throw new \OC\HintException(
+				$l->t('Database Error'),
+				$l->t('Please contact your system administrator.'),
+				0,
+				$e
+			);
 		}
 
 		return $result;

lib/private/db/statementwrapper.php

@@ -158,10 +158,13 @@ class OC_DB_StatementWrapper {
 			OC_Log::write('core', $entry, OC_Log::FATAL);
 			OC_User::setUserId(null);
 
-			// send http status 503
-			header('HTTP/1.1 503 Service Temporarily Unavailable');
-			header('Status: 503 Service Temporarily Unavailable');
-			throw new \OC\HintException($entry);
+			$l = \OC::$server->getL10N('lib');
+			throw new \OC\HintException(
+				$l->t('Database Error'),
+				$l->t('Please contact your system administrator.'),
+				0,
+				$e
+			);
 		}
 	}