Ability to set infinite timeout

[udf2457]

Would be nice if there was a way to set infinite timeout, --timeout=0 exits immediately and --timeout=-1 is an invalid option (similar for --count).

This would be useful for a couple of reasons:

• Allow simulation similar to an infinitewhile() loop
• Allow better testing of retries, for example one nats instance with --no-ack and then waiting for retry timeout

Yes, arguably you could set a long timeout, but something like -1 = infinite would be "cleaner" and more deterministic (and obvious when writing docs).

[ripienaar]

Suggest you just set a big one. Infinite timeout is usually a bad idea and will lead to issues.