short connection timeout

If the collector server is down, the script hangs for a long time at the script end.
An option or solution is needed that includes connection timeout.
This will make it easier to survive the collector server crash.

Start by locating the PHP entry point that sends data to the collector server and tracing where the script waits at shutdown. Check how connection failures are currently handled; done means a configurable connection timeout prevents a down collector from blocking script completion, with coverage for that failure path.

Written by the indexing model from the issue text.