[Bug 286669] getfacl: sort order of permissions different from other systems

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=286669

            Bug ID: 286669
           Summary: getfacl: sort order of permissions different from
                    other systems
           Product: Base System
           Version: 14.2-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: misc
          Assignee: bugs@FreeBSD.org
          Reporter: t@ida2.de

Hi,

while writing a script to set NFSv4 ACL on ZFS file systems I've noticed that
getfacl shows the permissions bits in in different order than other systems.

On FreeBSD the full_set is: "rwxpDdaARWcCos"
On illumos and Synology Diskstation Linux the full_set is: "rwxpdDaARWcCos"

Note the "dD" vs. "Dd".

Just for reference:
* delete (d)             Permission to delete a file.
* delete_child (D)       Permission to delete a file within a directory.

I've stumbled upon this minor oddity while trying to set the FreeBSD style ACE
on illumos, which fails:
 # chmod A+group:staff:rwxpDdaARWc--s:fd:allow /mnt/acltest
 Invalid permission(s) 'rwxpDdaARWc--s' specified

This one works:
 # chmod A+group:staff:rwxpdDaARWc--s:fd:allow /mnt/acltest

So why not use the same style?

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