Merge branch 'nightly' into 'nightly'

Enable configuration option for number of threads used by queuedaemons.php

Could we change the script for queuedaemon.php to using a configuration setting if not arguments such as -t or --threads is set?

Example in configuration file:

```
$config['queue']['threads'] = 15; //Spawning 15 threads for handling the queue
```

See merge request !105