Revert "bug #10207 [DomCrawler] Fixed filterXPath() chaining (robbertkl)"

This reverts commit c11c5888f31bd663dcdb12b5b3558e0897601a23, reversing
changes made to e453c4589d81a93d22a2d927a1f9282d3d72c994.
Merge branch '2.3' into 2.4

* 2.3:
  Revert "bug #10207 [DomCrawler] Fixed filterXPath() chaining (robbertkl)"
  Bypass sigchild detection if phpinfo is not available

Conflicts:
	src/Symfony/Component/DomCrawler/Crawler.php