Fixup exposed ldap startup state

src/ldap.js

@@ -15,7 +15,7 @@ const addonConfigs = require('./addonconfigs.js'),
     BoxError = require('./boxerror.js'),
     constants = require('./constants.js'),
     debug = require('debug')('box:ldap'),
-    debugExposed = require('debug')('box:ldapExposed'),
+    debugExposed = require('debug')('box:exposedLdap'),
     dns = require('./dns.js'),
     domains = require('./domains.js'),
     eventlog = require('./eventlog.js'),
@@ -698,7 +698,10 @@ async function start() {
 }
 
 async function stop() {
-    if (gServer) gServer.close();
+    if (!gServer) return;
+
+    gServer.close();
+    gServer = null;
 }
 
 // FIXME this needs to be restarted if settings changes or dashboard cert got renewed
@@ -725,7 +728,7 @@ async function startExposed() {
     });
 
     gExposedServer.on('error', function (error) {
-        debugExposed('start: server error ', error);
+        debugExposed('server startup error ', error);
     });
 
     gExposedServer.search('ou=users,dc=cloudron', authenticateApp, userSearch);
@@ -741,9 +744,15 @@ async function startExposed() {
         return next();
     });
 
+    debugExposed(`starting server on port ${constants.LDAPS_PORT}`);
     await util.promisify(gExposedServer.listen.bind(gExposedServer))(constants.LDAPS_PORT, '0.0.0.0');
 }
 
 async function stopExposed() {
-    if (gExposedServer) gExposedServer.close();
+    if (!gExposedServer) return;
+
+    debugExposed('stopping server');
+
+    gExposedServer.close();
+    gExposedServer = null;
 }