Fluent Bit silently ignores wrong parameter names in the service section

[lecaros]

Bug Report

Describe the bug
If an invalid parameter name is included in the SERVICE section, Fluent Bit silently ignores it.

To Reproduce

• Steps to reproduce the problem:

Use the following config:

[service]
  daemon off
  log_livel debug
  #log_level debug
  another_param 0

[input]
  name dummy
[output]
  name stdout

As you can see, it has two invalid parameters: log_livel and another_param.
If you run Fluent Bit with this config, you'll see no error is displayed; not even when running it with log_level debug.

Expected behavior
It should at least warn about the wrong parameter name.

Your Environment

• Version used: 3.0.4 from master.
• Configuration: Included above.