Merge branch '5.3' into 5.4

* 5.3:
  Fix skip condition for INTL
  [Messenger] Fix `ErrorDetailsStamp` denormalization
  [Translation] Extract translatable content on twig set
  Simplify code
  Fix composer.json versions
  Fix composer.json versions
  Remove redundant license info
  [HttpFoundation] Fix isNotModified determination logic
  Fix Url Validator false positives
  [Translation] Reverse fallback locales
  [FrameworkBundle] Fall back to default configuration in debug:config and consistently resolve parameter values
  notifier smsapi - fixed checking whether message is sent
  allow null for framework.translator.default_path
  improve failure messages of the CrawlerSelectorTextContains constraint

Author: nicolas-grekas

Constraints/UrlValidator.php

@@ -25,7 +25,7 @@ class UrlValidator extends ConstraintValidator
             (%s)://                                 # protocol
             (((?:[\_\.\pL\pN-]|%%[0-9A-Fa-f]{2})+:)?((?:[\_\.\pL\pN-]|%%[0-9A-Fa-f]{2})+)@)?  # basic auth
             (
-                ([\pL\pN\pS\-\_\.])+(\.?([\pL\pN]|xn\-\-[\pL\pN-]+)+\.?) # a domain name
+                ([\pL\pN\pS]+\.?[\pL\pN\pS\-\_]+)+(\.?([\pL\pN]|xn\-\-[\pL\pN-]+)+\.?) # a domain name
                     |                                                 # or
                 \d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}                    # an IP address
                     |                                                 # or

Tests/Constraints/UrlValidatorTest.php

@@ -100,6 +100,7 @@ public function getValidUrls()
         return [
             ['http://a.pl'],
             ['http://www.example.com'],
+            ['http://tt.example.com'],
             ['http://www.example.com.'],
             ['http://www.example.museum'],
             ['https://example.com/'],
@@ -260,6 +261,10 @@ public function getInvalidUrls()
             ['http://example.com/exploit.html?hel lo'],
             ['http://example.com/exploit.html?not_a%hex'],
             ['http://'],
+            ['http://www..com'],
+            ['http://www..example.com'],
+            ['http://wwww.example..com'],
+            ['http://.www.example.com'],
         ];
     }