[Bug 294113] make install fails because needed software is already installed

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294113

            Bug ID: 294113
           Summary: make install fails because needed software is already
                    installed
           Product: Base System
           Version: Unspecified
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: sblachmann@gmail.com

I am attempting to install Telegram desktop.
Pkg fails shamefully.
It pretends it installed successfully but it installed nothing, no files are
installed.
So next attempt to install is via ports.
But this also fails in a gross manner:

===>  Installing for qt6-lottie-6.9.1
===>  Checking if qt6-lottie is already installed
===>   qt6-lottie-6.9.1 is already installed
      You may wish to ``make deinstall'' and install this port again
      by ``make reinstall'' to upgrade it properly.
      If you really wish to overwrite the old port of qt6-lottie
      without deleting it first, set the variable "FORCE_PKG_REGISTER"
      in your environment or the "make install" command line.
*** Error code 1

BUG:
make install / pkg demand to reinstall an already-installed package, even
though exactly the correct version is installed.

EXPECTED BEHAVIOUR:
There is nothing to do in this step.
The package required is already there.
Thus make install / pkg should just skip to the next step.

If for some reason this behaviour is not desired, there should 
at least be an option to gracefully skip the intended destructive action.
(Yes, destructive... ask yourself, can you still count how many of your FreeBSD
installations have been damaged by pkg?)

SOLUTION:
Either fix make / pkg so they behave the expected way.
Or, add an opposite option to "FORCE_PKG_REGISTER", maybe
"USE_ALREADY_REGISTERED"?

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