Addresses #5011 check for proper string in smartos ssh error output

lib/ansible/runner/connection_plugins/ssh.py

@@ -247,8 +247,8 @@ class Connection(object):
             # the host to known hosts is not intermingled with multiprocess output.
             fcntl.lockf(self.runner.output_lockfile, fcntl.LOCK_UN)
             fcntl.lockf(self.runner.process_lockfile, fcntl.LOCK_UN)
-
-        if p.returncode != 0 and stderr.find('Bad configuration option: ControlPersist') != -1:
+        controlpersisterror = stderr.find('Bad configuration option: ControlPersist') or stderr.find('unknown configuration option: ControlPersist') != -1
+        if p.returncode != 0 and controlpersisterror:
             raise errors.AnsibleError('using -c ssh on certain older ssh versions may not support ControlPersist, set ANSIBLE_SSH_ARGS="" (or ansible_ssh_args in the config file) before running again')
 
         return (p.returncode, '', stdout, stderr)