Heartbeat http monitor is not sending headers

Hi @marvnz ,

This is a known bug/undocumented limitation of heartbeat < v6.7.0.
Specifically, the "host" header is ignored, it comes from GO, see below.

Originally reported:


fix: (commit and pull)

Backport to 6.7.0:

I myself didn't figure it out until I pointed heartbeat to a local netcat and figured that only the "host" header was silently ignored by heartbeat.
nc -kl 8888

My struggle:

Instant relief with 6.7.

Hoping this helps,


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