feature #931 Update monolog provider for support permissions (mmuruev)

This PR was submitted for the master branch but it was merged into the 1.2 branch instead (closes #931).

Discussion
----------

Update monolog provider for support permissions

Recently Monolog have an update commit b2e2530406737e658785e3b4e50135f297f49a16. Which add permission handling for log file.

Commits
-------

91b1cbc3 Update monolog provider for support permissions

doc/providers/monolog.rst

@@ -12,6 +12,8 @@ Parameters
 ----------
 
 * **monolog.logfile**: File where logs are written to.
+* **monolog.bubble** = (optional) Whether the messages that are handled can bubble up the stack or not.
+* **monolog.permission** = (optional) File permissions default (null), nothing change.
 
 * **monolog.level** (optional): Level of logging, defaults
   to ``DEBUG``. Must be one of ``Logger::DEBUG``, ``Logger::INFO``,

src/Silex/Provider/MonologServiceProvider.php

@@ -52,11 +52,12 @@ class MonologServiceProvider implements ServiceProviderInterface
 
             return $log;
         });
-
+        $app['monolog.bubble'] = true;
+        $app['monolog.permission'] = null;
         $app['monolog.handler'] = function () use ($app) {
             $level = MonologServiceProvider::translateLevel($app['monolog.level']);
 
-            return new StreamHandler($app['monolog.logfile'], $level);
+            return new StreamHandler($app['monolog.logfile'], $level, $app['monolog.bubble'], $app['monolog.permission']);
         };
 
         $app['monolog.level'] = function () {