#14 groupmod -M/m support

[Preston Smith]

I could really use the ability to do
"cpu groupmod somegroup -m psmith"
or
"cpu groupmod somegroup -M psmith,foobart,joeblow"

like "pw groupmod" can, so I can massage group
memberships.

[Nobody/Anonymous]

Logged In: NO

What is the difference between -M and -m? Does -M add to the
group and -m removes from the group?

[Preston Smith]

Logged In: YES
user_id=502916

Sorry, my example isn't clear enough:
Like FreeBSD pw, -M modifies a group's membership, replacing
the membership with the list
-m adds the named user to the group