More network_debug_troubleshooting.html (#23335) (#23341)

More "unable to open shell" -> network_debug_troubleshooting.html
(cherry picked from commit 13dc02d49d)

lib/ansible/plugins/action/junos.py

@@ -85,7 +85,10 @@ class ActionModule(_ActionModule):
                 rc, out, err = connection.exec_command('open_shell()')
 
             if rc != 0:
-                return {'failed': True, 'msg': 'unable to connect to control socket'}
+                return {'failed': True,
+                        'msg': 'unable to open shell. Please see: ' +
+                               'https://docs.ansible.com/ansible/network_debug_troubleshooting.html#unable-to-open-shell',
+                        'rc': rc}
 
         elif pc.connection == 'network_cli':
             # make sure we are in the right cli context which should be

lib/ansible/plugins/action/sros.py

@@ -71,7 +71,10 @@ class ActionModule(_ActionModule):
             # start the connection if it isn't started
             rc, out, err = connection.exec_command('open_shell()')
             if not rc == 0:
-                return {'failed': True, 'msg': 'unable to open shell', 'rc': rc}
+                return {'failed': True,
+                        'msg': 'unable to open shell. Please see: ' +
+                               'https://docs.ansible.com/ansible/network_debug_troubleshooting.html#unable-to-open-shell',
+                        'rc': rc}
 
         task_vars['ansible_socket'] = socket_path