Merge r1822537, r1830744 from trunk:
mpm_unix(es): cleanup properly on exit in one_process mode.
We can't destroy ap_pglobal in the MPMs because clean_child_exit() runs in
a DSO which would be unloaded under us.
So we defer an ap_terminate() with atexit() in ap_unixd_mpm_set_signals(),
all this is static/builtin code in "os/unix/unixd.c".
Follow up to r1822537: replace static variable with pool userdata.
Also adds a comment and a CHANGES entry.
Submitted by: ylavic
Reviewed by: ylavic, jim, icing
git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@
1833005 13f79535-47bb-0310-9956-
ffa450edef68