Avoid question mark and asterisk in folder names to prevent windows filesystem issues.

A previous commit introduced a folder with a question mark and an asterisk which are invalid NTFS folder name characters and prevented checkout on those systems.
Merge branch '2.3' into 2.4

* 2.3:
  typo fixed in AbstractProcessTest (getoutput() => getOutput())
  Avoid question mark and asterisk in folder names to prevent windows filesystem issues.
  [Translation] [Config] Clear libxml errors after parsing XML file

Conflicts:
	src/Symfony/Component/Config/Util/XmlUtils.php