Merge branch '4.3' into 4.4

* 4.3:
  [travis] Fix build-packages script
  [HttpClient] bugfix exploding values of headers
  Remove useless testCanCheckIfTerminalIsInteractive test case
  [Validator] Add the missing translations for the Thai (\"th\") locale
  [Routing] gracefully handle docref_root ini setting
  [Validator] Fix ValidValidator group cascading usage

Author: nicolas-grekas

Matcher/Dumper/CompiledUrlMatcherDumper.php

@@ -91,7 +91,7 @@ public function getCompiledRoutes(bool $forDump = false): array
 
         while (true) {
             try {
-                $this->signalingException = new \RuntimeException('preg_match(): Compilation failed: regular expression is too large');
+                $this->signalingException = new \RuntimeException('Compilation failed: regular expression is too large');
                 $compiledRoutes = array_merge($compiledRoutes, $this->compileDynamicRoutes($dynamicRoutes, $matchHost, $chunkLimit, $conditions));
 
                 break;
@@ -349,7 +349,7 @@ private function compileDynamicRoutes(RouteCollection $collection, bool $matchHo
             $state->markTail = 0;
 
             // if the regex is too large, throw a signaling exception to recompute with smaller chunk size
-            set_error_handler(function ($type, $message) { throw 0 === strpos($message, $this->signalingException->getMessage()) ? $this->signalingException : new \ErrorException($message); });
+            set_error_handler(function ($type, $message) { throw false !== strpos($message, $this->signalingException->getMessage()) ? $this->signalingException : new \ErrorException($message); });
             try {
                 preg_match($state->regex, '');
             } finally {

Matcher/Dumper/StaticPrefixCollection.php

@@ -197,6 +197,6 @@ private function getCommonPrefix(string $prefix, string $anotherPrefix): array
 
     public static function handleError($type, $msg)
     {
-        return 0 === strpos($msg, 'preg_match(): Compilation failed: lookbehind assertion is not fixed length');
+        return false !== strpos($msg, 'Compilation failed: lookbehind assertion is not fixed length');
     }
 }