Fix IPtables for adding duplicated iptables
Fixing #14880 listing nodes
Fixing #14880 listing nodes
Add list_users() to pw_user (FreeBSD)

Synced list_users() from useradd.py to pw_user.py.
Merge pull request #15205 from dmyerscough/14880-fix-list-nodes

Fixing #14880 vsphere node list
using splitlines method instead of split
Merge pull request #15206 from toddnni/pw-user-list-users

Add list_users() to pw_user (FreeBSD)
Merge pull request #15204 from dmyerscough/fix-duplicate-iptables

Stop duplicate rules
Add note concerning iptables --check workaround
Linting
Merge pull request #15216 from techhat/iptables

Add note concerning iptables --check workaround