FreeBSD 11.4 / 12.2 pkg-install problems startup service

[Stefan Parvu]

> 
> That said because we know a lot of people have been doing that for a while, pkg
> has an option (off by default) HANDLE_RC_SCRIPT
> 
> if you set it to true when installing your package it will start the rc.d script
> so you don't need to install that in your post install script.

Let me see if I understood this right? Usually, under pkg-install POST phase there could be set some final settings 
after the package is extracted and copied to its destination. But placing startup scripts or calling rc.d scripts from
that POST install phase would not work. Right ? Or does it?

I am asking because I want to be able to allow users to just say: pkg add kdr-1.6.2-freebsd11.4-amd64.txz 
and thats it. The sfw will install under /opt/kronometrix and all necessarily components should start automatically.
For that I was thinking I could use pkg-install POST phase.  Do you mean could I set true the HANDLE_RC_SCRIPT
variable is the pkg-install POST phase or where ?

Or do you mean, when I manually pkg add I should set true HANDLE_RC_SCRIPT from command line for pkg command ?

Cheers,
Stefan