Get UPID as a response (where request launched worker/runner)

[BenJaziaSadok]

Hello,
I need to update php client to always get a UPID for a valid request. It's valid for POST requests only. PUT returns boolean 1 if it's valid.
Is it possible to do this.
FYI: i updated the code to return the http error when something is wrong for debugging purpose

[lsthompson]

We likely don't want too much coming back in response, though it would make sense to pass the UPID back.

However at the same time, there are some helper functions added - start/stop/suspend/etc - which wait to finalise.