remove unnecessary options from api unit. Improve error messages... etc etc

lib/cli.js

@@ -871,22 +871,15 @@ program
       , 'secret (or $SECRET)'
       , String
       , process.env.SECRET)
-    .option('-a, --auth-url <url>'
-      , 'URL to auth client'
-      , String)
     .action(function(options) {
       if (!options.secret) {
         this.missingArgument('--secret')
       }
-      if (!options.authUrl) {
-        this.missingArgument('--auth-url')
-      }
 
       require('./units/api')({
         port: options.port
       , ssid: options.ssid
       , secret: options.secret
-      , authUrl: options.authUrl
       })
     })
 
@@ -1335,12 +1328,6 @@ program
           'api'
         , '--port', options.apiPort
         , '--secret', options.authSecret
-        , '--auth-url', options.authUrl || util.format(
-            'http://%s:%d/auth/%s/'
-          , options.publicIp
-          , options.poorxyPort
-          , ({oauth2: 'oauth'}[options.authType]) || options.authType
-          )
       ])
         // websocket
       , procutil.fork(__filename, [