Add a third argument to the "cfn" function that is an argument to
gpt_change_ent(). The purpose of the third argument is to specify
whether the entry to be changed is a primary GPT entry or a second

Add a third argument to the "cfn" function that is an argument to
gpt_change_ent(). The purpose of the third argument is to specify
whether the entry to be changed is a primary GPT entry or a secondary
GPT entry. It is assumed that a secondary GPT entry will always
follow a corresponding primary entry.

This is in preparation for an upcoming change that will require it.

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Not all things that write to the disk do something that dk(4) will
be interested in. Let individual commands decide if ioctl(DIOCMWEDGES)
should be done. I was conservative and set the flag on any

Not all things that write to the disk do something that dk(4) will
be interested in. Let individual commands decide if ioctl(DIOCMWEDGES)
should be done. I was conservative and set the flag on any command
that might create/modify/delete partitions in any way.

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Check device parameter to avoid segfaults. Agument synopsis for -l option.

Add listing commands for type, set and unset.
Add help and formatting for set and unset.
Change show to print all the attribute info in one line.

eliminate static globals so that commands can be re-used.

use the utility function.

refactor more duplicated code.

Refactor the command dispatching and help printing logic.

Firs step of refactoring, remove all globals, factor out some common code,
handle alternate usage but not advertise it.

merge the create errors in one place and fix them.

Fix handling of -t option for the type command.
Match any type, when no option is given, just like for the label command.

Add internal uuid support, since the linux+macos versions of the library
are different than than *bsd ones, and others might not have it at all.

remove compat defines.

minor toolification: need libprop...

PR/47990 - Dr. Wolfgang Stukenbrock -- add "-L <label>" as selector option

PR/44218 - David Young -- add "type" subcommand to change a partition type