apache-httpd: 2.4.38 -> 2.4.39 (CVE-2019-0211)

In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or
prefork, code executing in less-privileged child processes or
threads (including scripts executed by an in-process scripting interpreter)
could execute arbitrary code with the privileges of the parent process (usually
root) by manipulating the scoreboard.