Merge branch '4.4'

* 4.4:
  Update GitHub PR template
  [DI] fix related to preloading
  [HttpKernel] fix compat with legacy DebugClassLoader
  [WebProfilerBundle] Assign automatic colors to custom Stopwatch categories
  [DI] use dirname() when possible
  Simplify usage of dirname()
  Remove Google references when not needed
  Simplify usage of dirname()
  don't dump a scalar tag value on its own line
  Remove Google references when not needed
  [DI] fix Preloader
  [HttpClient] fix calling the buffer-enabling callback
  [HttpClient] fix php notice on push
  do not perform string operations on null
  Require exact match when reading from stdin with a dash

Author: nicolas-grekas

Tests/CookieTest.php

@@ -47,10 +47,10 @@ public function getTestsForToFromString()
         return [
             ['foo=bar; path=/'],
             ['foo=bar; path=/foo'],
-            ['foo=bar; domain=google.com; path=/'],
+            ['foo=bar; domain=example.com; path=/'],
             ['foo=bar; domain=example.com; path=/; secure', 'https://example.com/'],
             ['foo=bar; path=/; httponly'],
-            ['foo=bar; domain=google.com; path=/foo; secure; httponly', 'https://google.com/'],
+            ['foo=bar; domain=example.com; path=/foo; secure; httponly', 'https://example.com/'],
             ['foo=bar=baz; path=/'],
             ['foo=bar%3Dbaz; path=/'],
         ];