Merge r1876626 from trunk:

Merge r1876626 from trunk:

* server/mpm/prefork/prefork.c (prefork_pre_config): Use pconf as
  passed to the hook with ap_fatal_signal_child_setup, since
  prefork.c's pconf "global" is not set until the (later) open_logs
  hook, and if built as a DSO it may be reset inbetween.

* server/mpm/motorz/motorz.c (motorz_pre_config): Likewise.

[event and worker do not appear to have the same issue]

Submitted by: jorton
Reviewed by: https://lists.apache.org/thread.html/rc43315d87ac9bb92a6e0e4068d7680e7044df0a1640d514fd40f19fd%40%3Cdev.httpd.apache.org%3E

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1884320 13f79535-47bb-0310-9956-ffa450edef68