set_smtpsrv_threads docs section to be updated

I have checked the docs and found in the reference manual section there is a mistake in the function name set_smtpsrv_threads in the description it’s written kumo.set_httpinject_threads but in example it’s correct, please check once.

set_smtpsrv_threads log to be updated

set_smtpsrv_threads docs section to be updated

Yes, I also found out recently. I was about to submit pr

Merged, thanks!