OptionalObsoleteFiles: Support MIT KRB5

[cy]

Summary

If no Kerberos is wanted (MK_KERBEROS == no) remove whatever kerberos
is installed.

If MIT KRB5 is wanted (MK_MITKRB5 == yes) remove the Heimdal files.

If Heimdal is wanted (MK_MITKRB5 == no) remove the MIT KRB5 files.

Sponsored by: The FreeBSD Foundation

Test Plan

Running here for a month.

Some of my machines still run Heimdal while others MIT to test this (and test interoperability).

[markj]

I'm not sure how to review this. :)

How did you generate the list? I imagine something like, install two copies of the base system into two directories, one with WITHOUT_MITKRB5 defined, and then use mtree to compare the two staging trees?

[cy]

In D50814#1160426, @markj wrote:

I'm not sure how to review this. :)

How did you generate the list? I imagine something like, install two copies of the base system into two directories, one with WITHOUT_MITKRB5 defined, and then use mtree to compare the two staging trees?

I already had a list of files from the MIT port's pkg-plist. That was a good start. I then used mtree, using zfs snapshots to roll back and try again to iron out any bugs.

I'm less interested in a review of the file minutiae and more interested in the soundness of the approach I used.

I don't need anyone to "accept" this review. Just point out any glaring errors I may have made.