added ability to detect config changes to the socks5 module

lib/socks5-server.js

@@ -63,15 +63,28 @@ module.exports.create = function (deps, config) {
     });
   }
 
-  if (config.socks5 && config.socks5.enabled) {
-    start(config.socks5.port).catch(function (err) {
-      console.error('failed to start Socks5 proxy', err);
-    });
+  var configEnabled = false;
+  function updateConf() {
+    var wanted = config.socks5 && config.socks5.enabled;
+
+    if (configEnabled && !wanted) {
+      stop().catch(function (err) {
+        console.error('failed to stop socks5 proxy on config change', err);
+      });
+      configEnabled = false;
+    }
+    if (wanted && !configEnabled) {
+      start(config.socks5.port).catch(function (err) {
+        console.error('failed to start Socks5 proxy', err);
+      });
+      configEnabled = true;
+    }
   }
 
   return {
-    curState: curState
-  , start: start
-  , stop: stop
+    curState
+  , start
+  , stop
+  , updateConf
   };
 };