K 10
svn:author
V 6
emaste
K 8
svn:date
V 27
2017-08-19T00:19:23.834221Z
K 7
svn:log
V 450
pw usermod: Properly deal with empty secondary group lists (-G '')

"pw usermod someuser -G ''" is supposed make sure that someuser
doesn't have any secondary group memberships.

Previouly it was a nop because split_groups() only intitialised
"groups" if at least one group was specified. As a result the
existing secondary group memberships were kept.

PR:		221417
Submitted by:	Fabian Keil
Obtained from:	ElectroBSD
MFC after:	1 week
Relnotes:	yes

END