Connection: use socket.end() instead of socket.destroy()

lib/Connection.js

@@ -292,7 +292,7 @@ Connection.prototype.serverSupports = function(cap) {
 Connection.prototype.destroy = function() {
   this._queue = [];
   this._curReq = undefined;
-  this._sock && this._sock.destroy();
+  this._sock && this._sock.end();
 };
 
 Connection.prototype.end = function() {
@@ -1591,7 +1591,7 @@ Connection.prototype._login = function() {
     clearTimeout(self._tmrAuth);
     if (err) {
       self.emit('error', err);
-      return self._sock.destroy();
+      return self._sock.end();
     }
 
     // 2. Get the list of available namespaces (RFC2342)