Created attachment 1281471 [details]
proposed fix

Not completely sold on the name, but the functionality seems to fit the bill

After Fix:

[vm-rhel72-1 ~] $ rpm -q pcs
pcs-0.9.158-1.el7.x86_64

[vm-rhel72-2 ~] $ pcs cluster auth vm-rhel72-1 vm-rhel72-2 vm-rhel72-3
Username: hacluster
Password:
vm-rhel72-2: Authorized
vm-rhel72-3: Authorized
vm-rhel72-1: Authorized

[vm-rhel72-2 ~] $ pcs cluster node add-outside
Error: Usage: pcs cluster node add-outside <node[,node-altaddr]> <cluster node>
[vm-rhel72-2 ~] $ pcs cluster node add-outside vm-rhel72-2 vm-rhel72-1

[vm-rhel72-2 ~] $ pcs cluster start
Starting Cluster...

[vm-rhel72-2 ~] $ pcs status | grep Online
Online: [ vm-rhel72-1 vm-rhel72-2 vm-rhel72-3 ]

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:1958