Fix connectionless inside connectionful. Closes #3414

Author: hueniverse

lib/plugin.js

@@ -310,7 +310,7 @@ internals.Plugin.prototype.register = function (plugins /*, [options], callback
         }
 
         if (connectionless) {
-            selection.connection = this.connection;
+            selection.connection = this.root.connection;
         }
 
         // Register

npm-shrinkwrap.json

@@ -2,7 +2,7 @@
   "name": "hapi",
   "description": "HTTP Server framework",
   "homepage": "http://hapijs.com",
-  "version": "16.0.2",
+  "version": "16.0.3",
   "repository": {
     "type": "git",
     "url": "git://github.com/hapijs/hapi"

package.json

@@ -1342,6 +1342,44 @@ describe('Plugin', () => {
             });
         });
 
+        it('register nested connectionless plugin inside non-connectionless', (done) => {
+
+            const b = function (srv, options, next) {
+
+                if (!srv.connection) {
+                    return next(new Error('Missing connection()'));
+                }
+
+                return next();
+            };
+
+            b.attributes = {
+                name: 'b',
+                connections: false
+            };
+
+            const a = function (srv, options, next) {
+
+                srv.register(b, (err) => {
+
+                    expect(err).to.not.exist();
+                    return next();
+                });
+            };
+
+            a.attributes = {
+                name: 'a'
+            };
+
+            const server = new Hapi.Server();
+            server.connection();
+            server.register(a, (err) => {
+
+                expect(err).to.not.exist();
+                done();
+            });
+        });
+
         it('throws when nested connectionless plugins select', (done) => {
 
             const b = function (srv, options, next) {