symfony/MonologBundle — pull request #95 by lyrixx (2014-09-08 09:11:26+00:00)
Title: Do not require raven.dsn when a client_id is specified

Right now, I have the following configuration. And as you can see, the raven.dsn
is useless here, are the client_id service is not buildt by the extension
but by myself.

```yml
monolog:
handlers:
raven:
type: raven
# useless, because we set-up a custom client, but we have to...
dsn: %raven.dsn%
client_id: sensiolabs.toolkit.monolog.raven_client
```

So with with patch, we can use:

```yml
monolog:
handlers:
raven:
type: raven
client_id: sensiolabs.toolkit.monolog.raven_client
```

BTW, I don't know the target branch of this PR.