Update location reporting for Sentry

Report duration in ddhhmmss format

Adjust logging if peer present

Report total response time > 1s better

Adjust output to include start time and duration

Remove extra parameter from maxfail error path

Consolidate Sentry initialization and capture state

Update Sentry initialization

Add integration with sentry.io monitoring service

Fix a panic on shutdown

Rudimentary unit test for GetIPs

Add some unit tests for pinger.go

Ignore auto-generated version.go

Shorten sleep the first time around the loop

Add doc string for MakePeerAddr