Telegraf outputs.http plugin does not send basic authorization when configured

[cwesdorp]

Relevant telegraf.conf:

[[outputs.http]]
  url = "http://10.200.13.23:3000/write?db=default"
  method = "POST"
  username = "username"
  password = "passssword"
  data_format = "influx"

System info:

Telegraf 1.7 in the telegraf:latest docker image

Steps to reproduce:

1. Configure the outputs.http plugin with username/password
2. Start telegraf
3. send events (eg. echo "buttonClicks:1123|c|#app:game,region:eu" > /dev/udp/localhost/8125)
4. Check on the receiving end point

Expected behavior:

Request should have a Authorization header

Actual behavior:

There is no Authorization header

[cwesdorp]

Workaround is setting the authorization header manually in the outputs.http.headers section