Describe the bug

Libdatadog error messages repeat the error message multiple times. For instance, I've started the Ruby profiler without a Datadog agent, and this is the libdatadog error message I see:

failed ddog_prof_Exporter_send: error trying to connect: tcp connect error: Connection refused (os error 111): tcp connect error: Connection refused (os error 111): Connection refused (os error 111)

Since these are user-visible error messages, it's not great to have them be somewhat confusing.

To Reproduce
Steps to reproduce the behavior:

1. Try to report a profile with the exporter, and do not start the agent
2. Observe the error message from the exporter

Expected behavior

An error message that's not repeated.