Allow to return immediatly from queue.take() if there are no ready tasks

[rybakit]

queue.take(0, 'q')     -- waits indefinitely
queue.take(0, 'q', -1) -- waits indefinitely
queue.take(0, 'q', 0)  -- returns immediately
queue.take(0, 'q', 1)  -- waits 1 second and returns

[rybakit]

Ping?

[rtsisyk]

I think that a special constant should be used for waits indefinitely case.
For example:

local TIMEOUT_INFINITY   = 365 * 86400
queue.take(0, 'q')     -- waits indefinitely
queue.take(0, 'q', TIMEOUT_INFINITY) -- waits indefinitely
queue.take(0, 'q', 0)  -- returns immediately
queue.take(0, 'q', 1)  -- waits 1 second and returns

Anyway, please wait for @unera response.

[kostja]

Hi, would you still like this request to be pushed?

[rybakit]

Yes, I would like that.