Default host refactoring

lib/server.js

@@ -60,7 +60,11 @@ module.exports = internals.Server = function (/* host, port, options */) {
     this.settings = Utils.applyToDefaults(Defaults.server, args.options);
     this.settings.host = args.host && args.host.toLowerCase();
     this.settings.port = typeof args.port !== 'undefined' ? args.port : (this.settings.tls ? 443 : 80);
-    this.settings.nickname = this.settings.host + ':' + this.settings.port;
+
+    if (args.host && this.settings.port) {
+        this.settings.nickname = this.settings.host + ':' + this.settings.port;
+        this.settings.uri = (this.settings.tls ? 'https://' : 'http://') + this.settings.host + ':' + this.settings.port;
+    }
 
     // Set optional configuration
     // false -> null, true -> defaults, {} -> override defaults
@@ -265,7 +269,8 @@ internals.Server.prototype.start = function (callback) {
         // update the port and uri with what was actually bound
         var address = self.listener.address();
         self.settings.port = address.port;
-        self.settings.host = address.address;
+        self.settings.host = self.settings.host || address.address;
+        self.settings.nickname = self.settings.host + ':' + self.settings.port;
         self.settings.uri = (self.settings.tls ? 'https://' : 'http://') + self.settings.host + ':' + self.settings.port;
 
         Log.event('info', self.settings.nickname + ': Instance started at ' + self.settings.uri);