Merge branch '3.4' into 4.3

* 3.4:
  Improve some URLs
  Fix test compatibility with 4.x components
  [Cache] cs fix

Author: nicolas-grekas

Filesystem.php

@@ -53,7 +53,7 @@ public function copy($originFile, $targetFile, $overwriteNewerFiles = false)
         }
 
         if ($doCopy) {
-            // https://bugs.php.net/bug.php?id=64634
+            // https://bugs.php.net/64634
             if (false === $source = @fopen($originFile, 'r')) {
                 throw new IOException(sprintf('Failed to copy "%s" to "%s" because source file could not be opened for reading.', $originFile, $targetFile), 0, null, $originFile);
             }
@@ -281,7 +281,7 @@ public function rename($origin, $target, $overwrite = false)
 
         if (true !== @rename($origin, $target)) {
             if (is_dir($origin)) {
-                // See https://bugs.php.net/bug.php?id=54097 & http://php.net/manual/en/function.rename.php#113943
+                // See https://bugs.php.net/54097 & https://php.net/rename#113943
                 $this->mirror($origin, $target, null, ['override' => $overwrite, 'delete' => $overwrite]);
                 $this->remove($origin);
 

Tests/FilesystemTestCase.php

@@ -144,7 +144,7 @@ protected function markAsSkippedIfSymlinkIsMissing($relative = false)
             $this->markTestSkipped('symlink requires "Create symbolic links" privilege on Windows');
         }
 
-        // https://bugs.php.net/bug.php?id=69473
+        // https://bugs.php.net/69473
         if ($relative && '\\' === \DIRECTORY_SEPARATOR && 1 === PHP_ZTS) {
             $this->markTestSkipped('symlink does not support relative paths on thread safe Windows PHP versions');
         }