DFL background tasks

[Ali Çehreli via Digitalmars-d-learn]

Just a couple of minor improvements:

On 06/08/2015 12:22 AM, thedeemon wrote:

 > spawn() a thread and don't pass any GUI controls to it, just
 > thisTid (identifier of your main UI thread)

The owner's thread id is available as 'ownerTid' as well.

 > receiveTimeout(dur!"msecs"(0).

UFCS makes durations more pleasant: :)

     receiveTimeout(0.msecs)

Ali