Add passive to help alter maxscale output

The command was missing from the help output.

Documentation/Reference/MaxCtrl.md

@@ -590,7 +590,8 @@ of parameters can be altered at runtime:
     "auth_read_timeout",
     "auth_write_timeout",
     "admin_auth",
-    "admin_log_auth_failures"
+    "admin_log_auth_failures",
+    "passive"
 ]
 
 ## rotate

maxctrl/autodoc.sh

@@ -1,5 +1,8 @@
 #!/bin/bash
 
+# Install dependencies
+npm i
+
 ITEMS=`node maxctrl.js help|awk '/^$/{p=0} {if(p){print $1}}/Commands:/{p=1}'`
 
 TOC=$(for i in $ITEMS

maxctrl/lib/alter.js

@@ -35,7 +35,8 @@ const maxscale_params = [
     'auth_read_timeout',
     'auth_write_timeout',
     'admin_auth',
-    'admin_log_auth_failures'
+    'admin_log_auth_failures',
+    'passive'
 ]
 
 exports.command = 'alter <command>'